{"product_id":"watts-f121507","title":"Watts LF174A 140 FS 1 Lead-Free Relief Valve","description":"\u003cp\u003eThe Watts LF174A 140 FS 1 is a 1\" lead-free pressure relief valve for hot water boiler service, factory set at 140 psi. It is rated to 150 psi and up to 250°F. This model is certified lead-free for potable-water installations.\u003c\/p\u003e\u003cp\u003eThis lead free pressure relief valve has a 1 inch NPTF female inlet and outlet and a 140 psi pressure relief setpoint. This valve can be used for hot water space heating boiler applications to protect against excessive pressure. It features a lead free copper silicon alloy body , non-metallic disc-to-metal seating, and test lever. Includes a nonrestrictive discharge drain line flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve. When paired with an add on connection kit, the sensor is activated to relay alerts for potential flooding events. Connection kit options include BMS, cellular communication, and the Sensor Control Monitor which enables integration with BAS via RS‑485 Modbus or the Nexa platform through Wi-Fi.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFeatures a flood sensor with SentryPlus Alert technology to detect excessive water discharges from the relief valve\u003c\/li\u003e\n\u003cli\u003eRequires purchase of activation kit to activate sensor\u003c\/li\u003e\n\u003cli\u003eIntegrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa platform by Wi-Fi connectivity\u003c\/li\u003e\n\u003cli\u003eLead free copper silicon alloy body\u003c\/li\u003e\n\u003cli\u003eAutomatic reseating\u003c\/li\u003e\n\u003cli\u003eNon-mechanical seat to disc alignment\u003c\/li\u003e\n\u003cli\u003eSet pressure 140 psi\u003c\/li\u003e\n\u003cli\u003eIncludes: Flood Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat pressure is this valve set to?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eIt is factory set to relieve at 140 psi. The setting is fixed and is not field-adjustable. Note the 150 psi figure in the specifications is the maximum of the series' pressure range — the ceiling the body is built for, not this valve's relief point. This valve opens at 140 psi. Match it to the appliance nameplate: the relief setting must not exceed the working pressure stamped on the vessel you are protecting.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs this ASME rated?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. It is ASME rated and carries the \"HV\" code symbol under ASME BPVC Section XIII (the section that replaced Section IV for overpressure protection), and it is National Board (NBBI) certified. Inspectors look for that stamp on the valve body, and it is there.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan I use this on potable water?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. This is a boiler valve and is not approved for potable water, and that is true regardless of what the lead-free column says — hydronic boiler water is a closed, treated loop and is not drinking water. For a potable hot water heater or storage tank, use a T\u0026amp;P relief valve listed to ANSI Z21.22 \/ CSA 4.4 instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDoes the discharge have to be piped?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. Codes require the outlet to be piped full-size to a safe point of discharge, terminating with an air gap and no valve, cap, or reducer anywhere in the line — a relief valve that cannot discharge freely is not protecting anything. The manual test lever should be operated at least annually to confirm the valve is not seized.\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 Relief\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\u003eMax Pressure (psi):\u003c\/strong\u003e 150\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 LF174A 140 FS 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e up to 250°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e ASME Section XIII (HV), NBBI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Type:\u003c\/strong\u003e Pressure Only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory Set Pressure (psi):\u003c\/strong\u003e 140\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASME Code Rating:\u003c\/strong\u003e ASME Section XIII (HV)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Hot Water Boiler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Configuration:\u003c\/strong\u003e FNPT inlet x FNPT outlet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Reseating:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual Test Lever:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproved for Potable Water:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSentryPlus Alert Flood Sensor:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":54935756603691,"sku":"F121507","price":872.36,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/0ba94a6f8fe115c81df8c3fd0f4b9c3fae971c35_3234237e-5422-4aa1-bad0-4a0b21a7d1f4.jpg?v=1785985755","url":"https:\/\/citysupplygroup.com\/products\/watts-f121507","provider":"City Supply","version":"1.0","type":"link"}