{"product_id":"nibco-f-910-b-lf-4-flanged-silent-check-valve-4-in","title":"Nibco F-910-B-LF-4 Flanged Silent Check Valve 4 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe NIBCO F-910-B-LF-4 is a 4-inch flanged silent check valve constructed of cast iron and built to a lead-free standard. Silent check valves use an internal spring-assisted disc to close smoothly before flow reversal occurs, eliminating the water hammer common with swing-type checks. This design makes it well suited for commercial and industrial piping systems where pressure surges and noise are concerns. Licensed plumbers and pipefitters typically handle installation in mechanical rooms, booster systems, and building water service lines.\u003c\/p\u003e\n\u003cp\u003eThe F-910-B-LF-4 is used in commercial mechanical, industrial, and building service piping applications where backflow prevention is required. Its flanged end connections suit systems assembled with standard ANSI flanges. The valve accommodates horizontal installation and vertical installation with upward flow. It is a practical choice for potable water, HVAC hydronic loops, and general fluid handling lines where a quiet, reliable check is specified.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSilent spring-assisted disc closes before flow reversal to prevent water hammer\u003c\/li\u003e\n  \u003cli\u003eLead-free construction meets requirements for potable water service\u003c\/li\u003e\n  \u003cli\u003eFlanged end connections for bolted installation into standard ANSI flanged pipelines\u003c\/li\u003e\n  \u003cli\u003eCast iron body suited for commercial mechanical and industrial service\u003c\/li\u003e\n  \u003cli\u003eRated for horizontal or vertical (flow-up) installation\u003c\/li\u003e\n  \u003cli\u003eBacked by NIBCO 5-year 125 percent limited warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style flanged silent check valve for 4-inch commercial and industrial piping systems requiring backflow prevention with standard ANSI flange connections.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the International Plumbing Code. Shut off and depressurize the system fully before removing any existing valve or fitting. Verify flange bolt pattern and gasket selection match the mating pipe flanges before torquing fasteners. Confirm flow-direction arrow on the valve body is oriented correctly before completing the connection.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValve Type\u003c\/strong\u003e: Flanged silent check valve\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: Cast iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLead-Free\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Connection\u003c\/strong\u003e: Flanged\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 039923326515\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: NIBCO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: F-910-B-LF-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NIBCO","offers":[{"title":"Default Title","offer_id":51383354556722,"sku":"F-910-B-LF-4","price":1349.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312673242.png?v=1782594278","url":"https:\/\/voomisupply.com\/products\/nibco-f-910-b-lf-4-flanged-silent-check-valve-4-in","provider":"Voomi Supply","version":"1.0","type":"link"}