{"title":"Flow Measurement Valves","description":null,"products":[{"product_id":"watts-csm-81-f-8-valve","title":"Watts CSM-81-F 8 Balancing Valve, Semi-Steel, Flanged","description":"\u003cp\u003eThe Watts CSM-81-F 8 is an 8\" manual circuit balancing valve with Flanged connections. It features a semi-steel body and a ptfe seat.\u003c\/p\u003e\u003cp\u003eThis 8 inch flow measurement valve monitors system flow in medium to high flow rate HVAC units providing a highly accurate flow measurement. It consists of semi-steel body construction with a low-torque cylindrical plug design, flanged end connections, checked metering ports with drip caps, position indicator plate, positive shutoff, and two brass pressure taps. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, branch lines, and pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAccurate flow measurement\u003c\/li\u003e\n\u003cli\u003eFlanged end connections\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003cli\u003eLow torque\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 8 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 8\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 8 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-81-F 8 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 8\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 8\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 8\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Flanged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Semi-Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e PTFE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-81-F 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247346761833,"sku":"0036544","price":21020.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/389ca650e4a4b66b9d0bd669d32d265712161118_618569d0-6478-4f82-b706-7ed2b9f5b2e1.jpg?v=1785978246"},{"product_id":"watts-csm-81-f-6-valve","title":"Watts CSM-81-F 6 Balancing Valve, Semi-Steel, Flanged","description":"\u003cp\u003eThe Watts CSM-81-F 6 is a 6\" manual circuit balancing valve with Flanged connections. It features a semi-steel body and a ptfe seat.\u003c\/p\u003e\u003cp\u003eThis 6 inch flow measurement valve monitors system flow in medium to high flow rate HVAC units providing a highly accurate flow measurement. It consists of semi-steel body construction with a low-torque cylindrical plug design, flanged end connections, checked metering ports with drip caps, position indicator plate, positive shutoff, and two brass pressure taps. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, branch lines, and pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAccurate flow measurement\u003c\/li\u003e\n\u003cli\u003eFlanged end connections\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003cli\u003eLow torque\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 6 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 6\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 6 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-81-F 6 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 6\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 6\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 6\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Flanged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Semi-Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e PTFE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-81-F 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247347056745,"sku":"0036543","price":8944.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/389ca650e4a4b66b9d0bd669d32d265712161118.jpg?v=1785978237"},{"product_id":"watts-csm-81-f-5-valve","title":"Watts CSM-81-F 5 Balancing Valve, Semi-Steel, Flanged","description":"\u003cp\u003eThe Watts CSM-81-F 5 is a 5\" manual circuit balancing valve with Flanged connections. It features a semi-steel body and a ptfe seat.\u003c\/p\u003e\u003cp\u003eThis 5 inch flow measurement valve monitors system flow in medium to high flow rate HVAC units providing a highly accurate flow measurement. It consists of semi-steel body construction with a low-torque cylindrical plug design, flanged end connections, checked metering ports with drip caps, position indicator plate, positive shutoff, and two brass pressure taps. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, branch lines, and pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAccurate flow measurement\u003c\/li\u003e\n\u003cli\u003eFlanged end connections\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003cli\u003eLow torque\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 5 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 5\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 5 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-81-F 5 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 5\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 5\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 5\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Flanged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Semi-Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e PTFE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-81-F 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247348301929,"sku":"0036542","price":7368.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/389ca650e4a4b66b9d0bd669d32d265712161118_0c14fa2c-8847-46e2-b5ab-2cac484b71ce.jpg?v=1785978278"},{"product_id":"watts-csm-81-f-3-valve","title":"Watts CSM-81-F 3 Balancing Valve, Semi-Steel, Flanged","description":"\u003cp\u003eThe Watts CSM-81-F 3 is a 3\" manual circuit balancing valve with Flanged connections. It features a semi-steel body and a ptfe seat.\u003c\/p\u003e\u003cp\u003eThis 3 inch flow measurement valve monitors system flow in medium to high flow rate HVAC units providing a highly accurate flow measurement. It consists of semi-steel body construction with a low-torque cylindrical plug design, flanged end connections, checked metering ports with drip caps, position indicator plate, positive shutoff, and two brass pressure taps. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, branch lines, and pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAccurate flow measurement\u003c\/li\u003e\n\u003cli\u003eFlanged end connections\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003cli\u003eLow torque\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 3 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 3\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 3 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-81-F 3 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 3\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 3\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Flanged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Semi-Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e PTFE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-81-F 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247353839721,"sku":"0036541","price":2796.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/389ca650e4a4b66b9d0bd669d32d265712161118_35a2e617-9628-409e-b9a1-e761203b12f1.jpg?v=1785978262"},{"product_id":"watts-csm-81-f-2-1-2-valve","title":"Watts CSM-81-F 2 1\/2 Balancing Valve, Semi-Steel, Flanged","description":"\u003cp\u003eThe Watts CSM-81-F 2 1\/2 is a 2-1\/2\" manual circuit balancing valve with Flanged connections. It features a semi-steel body and a ptfe seat.\u003c\/p\u003e\u003cp\u003eThis 2 1\/2 inch flow measurement valve monitors system flow in medium to high flow rate HVAC units providing a highly accurate flow measurement. It consists of semi-steel body construction with a low-torque cylindrical plug design, flanged end connections, checked metering ports with drip caps, position indicator plate, positive shutoff, and two brass pressure taps. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, branch lines, and pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAccurate flow measurement\u003c\/li\u003e\n\u003cli\u003eFlanged end connections\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003cli\u003eLow torque\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 2 1\/2 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 2-1\/2\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 2 1\/2 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-81-F 2 1\/2 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 2-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 2-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 2-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Flanged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Semi-Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e PTFE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-81-F 2 1\/2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247355478121,"sku":"0036540","price":1679.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/389ca650e4a4b66b9d0bd669d32d265712161118_4e15e427-ad85-4db1-a5f8-1e06d8d5a06d.jpg?v=1785978270"},{"product_id":"watts-csm-61t-m1-3-valve","title":"Watts CSM-61T-M1 3 Balancing Valve, Bronze, NPT","description":"\u003cp\u003eThe Watts CSM-61T-M1 3 is a 3\" manual circuit balancing valve with NPT connections. It features a bronze body and a fkm (viton) seat.\u003c\/p\u003e\u003cp\u003eThis 3 inch flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of bronze body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two brass pressure taps, integral drain ports, thread connections, and a brass drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, small branch lines, unit heaters, unit ventilators, finned radiation, small domestic hot water lines, convectors, and small pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBronze body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eThreaded ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61T-M1 3 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 3\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61T-M1 3 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-61T-M1 3 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. 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It features a bronze body and a fkm (viton) seat.\u003c\/p\u003e\u003cp\u003eThis 2 1\/2 inch flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of bronze body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two brass pressure taps, integral drain ports, thread connections, and a brass drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, small branch lines, unit heaters, unit ventilators, finned radiation, small domestic hot water lines, convectors, and small pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBronze body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eThreaded ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61T-M1 2 1\/2 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 2-1\/2\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61T-M1 2 1\/2 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-61T-M1 2 1\/2 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 2-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 2-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 2-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-61T-M1 2 1\/2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247356788841,"sku":"0856734","price":1254.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/194cd085a00c0546f5d4b18f519dc7dff5afce39_065fabbe-9c97-48ac-8aaa-811f3b60d846.jpg?v=1785978273"},{"product_id":"watts-csm-81-ins-valve","title":"Watts CSM-81-INS Valve","description":"\u003cp\u003eInsulation Block For 1 1\/4 In Flow Measurement Valve, Series Csm\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247357149289,"sku":"36537","price":29.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/products\/098268648935_d7891c91-cbda-4081-b8e8-46faac8a1d49.jpg?v=1746839011"},{"product_id":"watts-csm-81-f-4-valve","title":"Watts CSM-81-F 4 Balancing Valve, Semi-Steel, Flanged","description":"\u003cp\u003eThe Watts CSM-81-F 4 is a 4\" manual circuit balancing valve with Flanged connections. It features a semi-steel body and a ptfe seat.\u003c\/p\u003e\u003cp\u003eThis 4 inch flow measurement valve monitors system flow in medium to high flow rate HVAC units providing a highly accurate flow measurement. It consists of semi-steel body construction with a low-torque cylindrical plug design, flanged end connections, checked metering ports with drip caps, position indicator plate, positive shutoff, and two brass pressure taps. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, branch lines, and pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAccurate flow measurement\u003c\/li\u003e\n\u003cli\u003eFlanged end connections\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003cli\u003eLow torque\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 4 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 4\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-81-F 4 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-81-F 4 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Flanged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Semi-Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e PTFE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-81-F 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247357870185,"sku":"0036535","price":3708.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/389ca650e4a4b66b9d0bd669d32d265712161118_3dc7f5a9-7a09-49f6-b961-6b6bae639363.jpg?v=1785978253"},{"product_id":"watts-csm-61-m1-t-1-valve","title":"Watts CSM-61-M1-T 1 Balancing Valve, Bronze, NPT","description":"\u003cp\u003eThe Watts CSM-61-M1-T 1 is a 1\" manual circuit balancing valve with NPT connections. It features a bronze body and a fkm (viton) seat.\u003c\/p\u003e\u003cp\u003eThis 1 inch flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of bronze body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two brass pressure taps, integral drain ports, thread connections, and a brass drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, small branch lines, unit heaters, unit ventilators, finned radiation, small domestic hot water lines, convectors, and small pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBronze body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eThreaded ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 1 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 1\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 1 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-61-M1-T 1 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 1\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 1\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-61-M1-T 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247359410281,"sku":"0856740","price":246.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/194cd085a00c0546f5d4b18f519dc7dff5afce39_2d968aec-935f-4f83-b760-bcfe44e40067.jpg?v=1785978284"},{"product_id":"watts-csm-61-m1-t-1-1-2-valve","title":"Watts CSM-61-M1-T 1 1\/2 Balancing Valve, Bronze, NPT","description":"\u003cp\u003eThe Watts CSM-61-M1-T 1 1\/2 is a 1-1\/2\" manual circuit balancing valve with NPT connections. It features a bronze body and a fkm (viton) seat.\u003c\/p\u003e\u003cp\u003eThis 1 1\/2 inch flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of bronze body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two brass pressure taps, integral drain ports, thread connections, and a brass drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, small branch lines, unit heaters, unit ventilators, finned radiation, small domestic hot water lines, convectors, and small pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBronze body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eThreaded ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 1 1\/2 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 1-1\/2\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 1 1\/2 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-61-M1-T 1 1\/2 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 1-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 1-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-61-M1-T 1 1\/2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247359541353,"sku":"0856744","price":440.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/fcdfb1736cd434a9e573f088b47c2ab62ea6373f.jpg?v=1785978248"},{"product_id":"watts-csm-knob-valve","title":"Watts CSM-KNOB Lead-Free Balancing Valve, Lead-Free Bronze","description":"\u003cp\u003eThe Watts CSM-KNOB is a lead-free manual circuit balancing valve. It features a lead-free bronze body and a fkm (viton) seat. This model is certified lead-free for potable-water installations.\u003c\/p\u003e\u003cp\u003eThis knob is designed for 1\/2 to 1 inch flow measurement valve, series LFCSM-61-S.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-KNOB is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the  body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-KNOB gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-KNOB is a lead-free model, which is what makes it legal for potable water — balancing a DHW recirculation loop means the valve sits in the drinking-water path. Use it to set the return flow on each riser so the far fixtures get hot water without over-pumping the near ones. The standard (non-LF) models in this series are for closed hydronic loops only.\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Lead-Free Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling, DHW Recirculation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 50\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-KNOB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e NSF-61\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247359770729,"sku":"0856747","price":20.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/71604a0e74755470bb13576a1ed033a7505b8558.jpg?v=1785978253"},{"product_id":"watts-csm-61-m1-t-1-2-valve","title":"Watts CSM-61-M1-T 1\/2 Balancing Valve, Bronze, NPT","description":"\u003cp\u003eThe Watts CSM-61-M1-T 1\/2 is a 1\/2\" manual circuit balancing valve with NPT connections. It features a bronze body and a fkm (viton) seat.\u003c\/p\u003e\u003cp\u003eThis 1\/2 inch flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of bronze body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two brass pressure taps, integral drain ports, thread connections, and a brass drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, small branch lines, unit heaters, unit ventilators, finned radiation, small domestic hot water lines, convectors, and small pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBronze body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eThreaded ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 1\/2 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 1\/2\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 1\/2 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-61-M1-T 1\/2 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-61-M1-T 1\/2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247364948073,"sku":"0856736","price":176.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/194cd085a00c0546f5d4b18f519dc7dff5afce39.jpg?v=1785978239"},{"product_id":"watts-csm-61-m1-t-1-1-4-valve","title":"Watts CSM-61-M1-T 1 1\/4 Balancing Valve, Bronze, NPT","description":"\u003cp\u003eThe Watts CSM-61-M1-T 1 1\/4 is a 1-1\/4\" manual circuit balancing valve with NPT connections. It features a bronze body and a fkm (viton) seat.\u003c\/p\u003e\u003cp\u003eThis 1 1\/4 inch flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of bronze body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two brass pressure taps, integral drain ports, thread connections, and a brass drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, small branch lines, unit heaters, unit ventilators, finned radiation, small domestic hot water lines, convectors, and small pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBronze body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eThreaded ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 1 1\/4 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 1-1\/4\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 1 1\/4 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-61-M1-T 1 1\/4 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1-1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 1-1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 1-1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-61-M1-T 1 1\/4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247365013609,"sku":"0856742","price":369.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/fcdfb1736cd434a9e573f088b47c2ab62ea6373f_c6ae86dd-359f-4ee9-8d7c-8460f6961c08.jpg?v=1785978268"},{"product_id":"watts-lfcsm-61-m1-s-1-2-valve","title":"Watts LFCSM-61-M1-S 1\/2 Lead-Free Balancing Valve, Lead-Free Bronze, Sweat","description":"\u003cp\u003eThe Watts LFCSM-61-M1-S 1\/2 is a 1\/2\" lead-free manual circuit balancing valve with Sweat connections. It features a lead-free bronze body and a fkm (viton) seat. This model is certified lead-free for potable-water installations.\u003c\/p\u003e\u003cp\u003eThis 1\/2 inch lead free flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of lead free body construction with bi-directional positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two pressure taps, integral drain ports, solder connections, and a drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment and is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, unit heaters, unit ventilators, finned radiation, and small domestic hot water lines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLead free body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eSolder ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M1-S 1\/2 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 1\/2\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M1-S 1\/2 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M1-S 1\/2 is a lead-free model, which is what makes it legal for potable water — balancing a DHW recirculation loop means the valve sits in the drinking-water path. Use it to set the return flow on each riser so the far fixtures get hot water without over-pumping the near ones. The standard (non-LF) models in this series are for closed hydronic loops only.\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Sweat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Lead-Free Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling, DHW Recirculation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e LFCSM-61-M1-S 1\/2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e NSF-61\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247365144681,"sku":"0856809","price":298.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/50fdec2bc5628311d59b6a910857c58c55cddddd_fd894e55-7747-422f-8cf6-66ee33800e35.jpg?v=1785978280"},{"product_id":"watts-lfcsm-61-m1-s-3-4-valve","title":"Watts LFCSM-61-M1-S 3\/4 Lead-Free Balancing Valve, Lead-Free Bronze, Sweat","description":"\u003cp\u003eThe Watts LFCSM-61-M1-S 3\/4 is a 3\/4\" lead-free manual circuit balancing valve with Sweat connections. It features a lead-free bronze body and a fkm (viton) seat. This model is certified lead-free for potable-water installations.\u003c\/p\u003e\u003cp\u003eThis 3\/4 inch lead free flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of lead free body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two pressure taps, integral drain ports, solder connections, and a drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment and is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, unit heaters, unit ventilators, finned radiation, and small domestic hot water lines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLead free body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eSolder ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M1-S 3\/4 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 3\/4\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M1-S 3\/4 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M1-S 3\/4 is a lead-free model, which is what makes it legal for potable water — balancing a DHW recirculation loop means the valve sits in the drinking-water path. Use it to set the return flow on each riser so the far fixtures get hot water without over-pumping the near ones. The standard (non-LF) models in this series are for closed hydronic loops only.\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Sweat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Lead-Free Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling, DHW Recirculation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e LFCSM-61-M1-S 3\/4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e NSF-61\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247365668969,"sku":"0856810","price":206.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/50fdec2bc5628311d59b6a910857c58c55cddddd_05b642ab-c334-4d7a-ba5b-f69ac775648b.jpg?v=1785978249"},{"product_id":"watts-lfcsm-61-m1-s-1-valve","title":"Watts LFCSM-61-M1-S 1 Lead-Free Balancing Valve, Lead-Free Bronze, Sweat","description":"\u003cp\u003eThe Watts LFCSM-61-M1-S 1 is a 1\" lead-free manual circuit balancing valve with Sweat connections. It features a lead-free bronze body and a fkm (viton) seat. This model is certified lead-free for potable-water installations.\u003c\/p\u003e\u003cp\u003eThis 1 inch lead free flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of lead free body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two pressure taps, integral drain ports, solder connections, and a drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment and is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, unit heaters, unit ventilators, finned radiation, and small domestic hot water lines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLead free body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eSolder ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M1-S 1 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 1\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M1-S 1 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M1-S 1 is a lead-free model, which is what makes it legal for potable water — balancing a DHW recirculation loop means the valve sits in the drinking-water path. Use it to set the return flow on each riser so the far fixtures get hot water without over-pumping the near ones. The standard (non-LF) models in this series are for closed hydronic loops only.\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 1\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 1\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Sweat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Lead-Free Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling, DHW Recirculation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e LFCSM-61-M1-S 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e NSF-61\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247365832809,"sku":"0856811","price":293.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/50fdec2bc5628311d59b6a910857c58c55cddddd_643e3490-5431-4e0f-a563-2802c2661f65.jpg?v=1785978263"},{"product_id":"watts-lfcsm-61-m2-s-1-1-4-valve","title":"Watts LFCSM-61-M2-S 1 1\/4 Lead-Free Balancing Valve, Lead-Free Bronze, Sweat","description":"\u003cp\u003eThe Watts LFCSM-61-M2-S 1 1\/4 is a 1-1\/4\" lead-free manual circuit balancing valve with Sweat connections. It features a lead-free bronze body and a fkm (viton) seat. This model is certified lead-free for potable-water installations.\u003c\/p\u003e\u003cp\u003eThis 1 1\/4 inch lead free flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of lead free body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two pressure taps, integral drain ports, solder connections, and a drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment and is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, unit heaters, unit ventilators, finned radiation, and small domestic hot water lines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLead free body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eSolder ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M2-S 1 1\/4 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 1-1\/4\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M2-S 1 1\/4 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M2-S 1 1\/4 is a lead-free model, which is what makes it legal for potable water — balancing a DHW recirculation loop means the valve sits in the drinking-water path. Use it to set the return flow on each riser so the far fixtures get hot water without over-pumping the near ones. The standard (non-LF) models in this series are for closed hydronic loops only.\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1-1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 1-1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 1-1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Sweat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Lead-Free Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling, DHW Recirculation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e LFCSM-61-M2-S 1 1\/4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e NSF-61\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247366914153,"sku":"0856812","price":600.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/50fdec2bc5628311d59b6a910857c58c55cddddd_0f9dc81c-ec57-4ad2-85ab-d15c81997550.jpg?v=1785978256"},{"product_id":"watts-lfcsm-61-m2-s-1-1-2-valve","title":"Watts LFCSM-61-M2-S 1 1\/2 Lead-Free Balancing Valve, Lead-Free Bronze, Sweat","description":"\u003cp\u003eThe Watts LFCSM-61-M2-S 1 1\/2 is a 1-1\/2\" lead-free manual circuit balancing valve with Sweat connections. It features a lead-free bronze body and a fkm (viton) seat. This model is certified lead-free for potable-water installations.\u003c\/p\u003e\u003cp\u003eThis 1 1\/2 inch lead free flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of lead free body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two pressure taps, integral drain ports, solder connections, and a drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment and is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, unit heaters, unit ventilators, finned radiation, and small domestic hot water lines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLead free body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eSolder ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M2-S 1 1\/2 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 1-1\/2\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M2-S 1 1\/2 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M2-S 1 1\/2 is a lead-free model, which is what makes it legal for potable water — balancing a DHW recirculation loop means the valve sits in the drinking-water path. Use it to set the return flow on each riser so the far fixtures get hot water without over-pumping the near ones. 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It features a lead-free bronze body and a fkm (viton) seat. This model is certified lead-free for potable-water installations.\u003c\/p\u003e\u003cp\u003eThis 2 inch lead free flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of lead free body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two pressure taps, integral drain ports, solder connections, and a drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment and is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, unit heaters, unit ventilators, finned radiation, and small domestic hot water lines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLead free body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eSolder ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M2-S 2 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 2\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M2-S 2 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The LFCSM-61-M2-S 2 is a lead-free model, which is what makes it legal for potable water — balancing a DHW recirculation loop means the valve sits in the drinking-water path. Use it to set the return flow on each riser so the far fixtures get hot water without over-pumping the near ones. The standard (non-LF) models in this series are for closed hydronic loops only.\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Sweat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Lead-Free Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling, DHW Recirculation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e LFCSM-61-M2-S 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e NSF-61\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247370027113,"sku":"0856814","price":1024.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/50fdec2bc5628311d59b6a910857c58c55cddddd.jpg?v=1785978242"},{"product_id":"watts-csm-61-m1-t-3-4-valve","title":"Watts CSM-61-M1-T 3\/4 Balancing Valve, Bronze, NPT","description":"\u003cp\u003eThe Watts CSM-61-M1-T 3\/4 is a 3\/4\" manual circuit balancing valve with NPT connections. It features a bronze body and a fkm (viton) seat.\u003c\/p\u003e\u003cp\u003eThis 3\/4 inch flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of bronze body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two brass pressure taps, integral drain ports, thread connections, and a brass drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, small branch lines, unit heaters, unit ventilators, finned radiation, small domestic hot water lines, convectors, and small pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBronze body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eThreaded ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 3\/4 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 3\/4\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 3\/4 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-61-M1-T 3\/4 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-61-M1-T 3\/4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247371599977,"sku":"0856738","price":194.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/194cd085a00c0546f5d4b18f519dc7dff5afce39_a7ebe9bb-94fe-409a-876d-fe9de8d92ef4.jpg?v=1785978285"},{"product_id":"watts-csm-61-m1-t-2-valve","title":"Watts CSM-61-M1-T 2 Balancing Valve, Bronze, NPT","description":"\u003cp\u003eThe Watts CSM-61-M1-T 2 is a 2\" manual circuit balancing valve with NPT connections. It features a bronze body and a fkm (viton) seat.\u003c\/p\u003e\u003cp\u003eThis 2 inch flow measurement valve monitors system flow in low to medium flow rate HVAC units, providing a highly accurate flow measurement. It consists of bronze body construction with bi-directional, positive shutoff ball valve design, blow-out proof stem, a position indicator, memory device, checked metering ports with drip caps, two brass pressure taps, integral drain ports, thread connections, and a brass drain plug. It has a compact size which allows for easy installation and access in a crowded piping environment. It is ideal in hot\/chilled water units such as fan coil units, water source heat pumps, reheat coils, panel coils, small branch lines, unit heaters, unit ventilators, finned radiation, small domestic hot water lines, convectors, and small pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBronze body\u003c\/li\u003e\n\u003cli\u003eBi-directional flow\u003c\/li\u003e\n\u003cli\u003eThreaded ends\u003c\/li\u003e\n\u003cli\u003ePositive shutoff\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eDo I need a separate meter to read the flow?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 2 is a differential-pressure device: it meters through dual PT (pressure\/temperature) ports with checked drip caps. You connect a balancing meter (or a differential gauge) across the two ports, read the pressure drop, and convert it to GPM using the Watts flow chart for the 2\" body. The valve does not display flow on its own. If you want set-and-read balancing without a meter, use the Watts iDROSET CSD direct-reading series instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan it also shut off the circuit?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. The CSM-61-M1-T 2 gives positive, drip-tight shutoff, so it doubles as the service valve for the circuit and you do not have to buy and install a separate ball valve next to it. The memory stop preserves your balanced setting: close the valve for service, reopen it against the stop, and the circuit returns to the same flow without rebalancing.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use it on a domestic hot water recirculation line?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. The CSM-61-M1-T 2 is not a lead-free model, so it is restricted to closed hydronic heating and chilled-water loops and other non-potable service. For DHW recirculation balancing, choose the lead-free equivalent — the Watts LFCSM-61-S (PT-port) or LFiDROSET CSD (direct-reading).\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat \/ Seal Material:\u003c\/strong\u003e FKM (Viton)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hydronic Heating\/Cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Limited\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CSM-61-M1-T 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalancing Type:\u003c\/strong\u003e Manual Circuit Balancing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Functions:\u003c\/strong\u003e Balancing;Flow Measurement;Shutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Readout:\u003c\/strong\u003e Dual PT ports, 1\/4\" SAE 45° flare, checked w\/ drip caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory Stop:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shutoff:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":31247372648553,"sku":"0856746","price":579.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/fcdfb1736cd434a9e573f088b47c2ab62ea6373f_a0137c79-ca30-49f4-b304-477de3248564.jpg?v=1785978295"}],"url":"https:\/\/citysupplygroup.com\/collections\/flow-measurement-valves-smart.oembed","provider":"City Supply","version":"1.0","type":"link"}