{"product_id":"specialty-mfr-6850290-inline-check-valve-0-5-in-fnpt","title":"Specialty Mfr 6850290 Inline Check Valve 0.5 in Fnpt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPECIALTY MFR 6850290 is a 1\/2-inch inline check valve designed to allow one-directional fluid flow while preventing backflow in plumbing and fluid-handling systems. The body is constructed from polypropylene for corrosion resistance in chemical and water service applications. It connects via female NPT threads on both ends, making it straightforward to thread into existing pipe runs. Key performance specs include a maximum working pressure of 125 psi, a maximum operating temperature of 140 degrees F, and a crack pressure of 0.33 psi. The Viton seal material provides compatibility with a broad range of fluid types. Plumbers and pipefitters are the primary installers for this type of fitting.\u003c\/p\u003e\u003cp\u003eThis check valve is suited for residential and light commercial plumbing, water treatment, chemical feed, and pool and spa piping systems where backflow prevention is required in a 1\/2-inch line. The low crack pressure of 0.33 psi means the valve opens with minimal upstream pressure, making it appropriate for low-flow or gravity-assisted systems. The FNPT x FNPT configuration threads directly into standard NPT pipe fittings without adapters. The black polypropylene body handles mildly corrosive fluids that would degrade brass or iron fittings.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePolypropylene body resists corrosion in chemical and water service environments\u003c\/li\u003e\n\u003cli\u003eViton seal material compatible with a wide range of fluids including mild chemicals\u003c\/li\u003e\n\u003cli\u003eStainless steel spring provides reliable cracking and reseating across temperature cycles\u003c\/li\u003e\n\u003cli\u003eLow crack pressure of 0.33 psi suits low-flow and gravity-feed applications\u003c\/li\u003e\n\u003cli\u003eFNPT x FNPT ends thread directly into standard 1\/2-inch NPT fittings\u003c\/li\u003e\n\u003cli\u003eRated to 125 psi maximum working pressure for standard plumbing service\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation check valve for 1\/2-inch NPT threaded plumbing systems requiring inline backflow prevention.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a licensed plumber or qualified pipefitter. Shut off supply pressure and depressurize the line before threading in the valve. Use thread sealant tape or compound rated for the fluid being handled and observe applicable IPC requirements for check valve orientation. Do not exceed the rated 125 psi working pressure or 140 degrees F temperature limit in service.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Type\u003c\/strong\u003e: Inline Check Valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Size\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: FNPT x FNPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: Polypropylene\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal Material\u003c\/strong\u003e: Viton\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Material\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrack Pressure\u003c\/strong\u003e: 0.33 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Pressure\u003c\/strong\u003e: 125 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Temperature\u003c\/strong\u003e: 140 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 9 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SPECIALTY MFR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6850290\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPECIALTY MFR","offers":[{"title":"Default Title","offer_id":67915460313394,"sku":"6850290","price":31.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/740137253192dd203db3cb5ce5c7d014.jpg?v=1791253688","url":"https:\/\/voomisupply.com\/products\/specialty-mfr-6850290-inline-check-valve-0-5-in-fnpt","provider":"Voomi Supply","version":"1.0","type":"link"}