{"product_id":"watts-0358555","title":"Watts 3\/4 LF40XL 150\/210 Lead-Free Relief Valve, Brass, NPT","description":"\u003cp\u003eThe Watts 3\/4 LF40XL 150\/210 is a 3\/4\" lead-free temperature and pressure (T\u0026amp;P) relief valve for commercial water heater service, factory set at 150 psi and 210°F. It features a brass body. Rated to 150 psi and up to 210°F. This model is certified lead-free for potable-water installations.\u003c\/p\u003e\u003cp\u003eThis 3\/4 inch lead free automatic reseating temperature and pressure relief valve with a 5 inch thermostat installs directly in tank tappings and is used in commercial applications to provide automatic temperature and pressure protection for hot water supply tanks and hot water heaters. It features lead free brass construction with NPT male inlet and NPT female outlet connections, thermo-bonded coated thermostat, tamper resistant bonnet screws, automatic reseating feature, and test lever. The temperature relief is 210 degrees F (99 degrees C) and the pressure relief is 150 psi.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLead free construction\u003c\/li\u003e\n\u003cli\u003eTamper resistant bonnet screws\u003c\/li\u003e\n\u003cli\u003e5 Inch thermostat length\u003c\/li\u003e\n\u003cli\u003eNon-mechanical seat to disc alignment\u003c\/li\u003e\n\u003cli\u003eIncludes: Tamper Switch\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 150 psi and 210°F. The setting is fixed and is not field-adjustable.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWill it fit my water heater — what BTU input does it cover?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eSizing a T\u0026amp;P valve is a capacity question, not just a thread question: the valve's BTU\/hr discharge rating must equal or exceed the input on the heater's data plate. Watts does not publish a capacity for this specific model in the data we carry, so check the BTU\/hr figure on the valve's spec sheet against your heater's nameplate input before ordering. The 5\" thermostat probe also has to reach the hot water in the tank — confirm it suits your tapping.\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. It is also ANSI Z21.22 \/ CSA 4.4 approved, which is the listing water heater relief valves are required to carry. 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\u003eYes. It is certified lead-free to NSF\/ANSI 372, which is what plumbing codes require for any device in a drinking-water line.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat thermostat length do I need?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThis valve has a 5\" thermostat probe. The probe must reach into the top 6\" of the tank's stored water to sense temperature, so it has to match the depth of your tapping — too short and the valve never sees the overheat it exists to catch. Watts builds this series in several probe lengths; measure before ordering.\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 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 Brass\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 3\/4 LF40XL 150\/210\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e up to 210°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e ASME Section XIII (HV), NBBI, ANSI Z21.22, CSA 4.4\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 Temperature \u0026amp; Pressure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory Set Pressure (psi):\u003c\/strong\u003e 150\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Setting (°F):\u003c\/strong\u003e 210\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 Commercial Water Heater\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermostat \/ Element Length (in.):\u003c\/strong\u003e 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length:\u003c\/strong\u003e Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Configuration:\u003c\/strong\u003e MNPT 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 Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSentryPlus Alert Flood Sensor:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":54935747166507,"sku":"0358555","price":715.29,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/fbeffc8e22121ea9658818f0d4aaea25d75f86b7.jpg?v=1785985580","url":"https:\/\/citysupplygroup.com\/products\/watts-0358555","provider":"City Supply","version":"1.0","type":"link"}