{"product_id":"watts-0190919","title":"Watts FP53L-M1-300 1\/2 Relief Valve, FNPT","description":"\u003cp\u003eThe Watts FP53L-M1-300 1\/2 is a 1\/2\" pressure relief valve for fire protection service, factory set at 300 psi. It is rated to 225 psi.\u003c\/p\u003e\u003cp\u003eThis 1\/2 inch, 300 psi pressure relief valve is designed to relieve thermal expansion in fire protection systems. It features a lever for flushing and draining the system and a second lever to lock the valve closed for hydrostatic testing of the system. This relief valve is FM and UL listed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1\/2\" male NPT inlet connection\u003c\/li\u003e\n\u003cli\u003e1\/2\" F-NPT outlet connection\u003c\/li\u003e\n\u003cli\u003e300 psi set pressure\u003c\/li\u003e\n\u003cli\u003eFM and UL Listed\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 300 psi. The setting is fixed and is not field-adjustable. Note the 225 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 300 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\u003eCan I use this on potable water?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. This model is not certified lead-free, so it cannot be installed in a potable (drinking) water line under the NSF\/ANSI 372 weighted-average lead rule. Use it on non-potable service, or order the \"LF\" version of this model for potable water.\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\/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 FNPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pressure (psi):\u003c\/strong\u003e 225\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 FP53L-M1-300 1\/2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e UL, FM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e No\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 300\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Fire Protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length:\u003c\/strong\u003e Standard\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 No\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":54935735304491,"sku":"0190919","price":145.16,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/e7fd09ca006891b32e17d89d94383d2974fd6cb2_3d8edda8-fe43-4022-9bb9-a9882a82a0e6.jpg?v=1785985343","url":"https:\/\/citysupplygroup.com\/products\/watts-0190919","provider":"City Supply","version":"1.0","type":"link"}