{"product_id":"m2-4-inch-fire-service-check-valve-22550","title":"M2 4-Inch Fire Service Check Valve | SKU 22550","description":"\u003cdiv\u003e\n\u003cp\u003eThe Viking M2 4-Inch Fire Service Check Valve (SKU 22550) maintains unidirectional water flow in commercial fire protection systems and prevents reverse pressure backflow. Install this inline component within wet pipe, dry pipe, or preaction system piping assemblies to isolate downstream water when system pressure drops occur.\u003c\/p\u003e \u003cp\u003eThis valve satisfies life safety requirements and complies with NFPA 13 standards for sprinkler system installations, as well as NFPA 25 inspection, testing, and maintenance guidelines.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDuctile Iron Body:\u003c\/strong\u003e Heavy-duty ductile iron construction delivers high tensile strength and impact resistance for mechanical rooms and riser assemblies.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStainless Steel Clapper:\u003c\/strong\u003e Corrosion-resistant stainless steel assembly ensures reliable actuation and prevents binding during high-flow events.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEPDM Rubber Seal:\u003c\/strong\u003e Resilient EPDM rubber facing provides a tight, leak-free bubble seal against the brass seat under varying system pressures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrass Seat:\u003c\/strong\u003e Precision-machined brass seating surface offers superior wear resistance and prevents corrosion-induced sticking over extended maintenance cycles.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4-Inch Nominal Size:\u003c\/strong\u003e Standardized 4-inch sizing integrates seamlessly with commercial fire sprinkler main feeds and backflow loops.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ctable\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eManufacturer \/ Brand\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eViking\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eModel \/ Series Number \/ SIN\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eM2 (Model M-2) \/ SKU 22550\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eConnection \/ Thread Size \u0026amp; Type\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e4 Inches\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMaterial \/ Body Construction\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eDuctile Iron Body, Stainless Steel Assembly\/Clapper, EPDM Rubber, Brass Seat\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eAgency Listings \u0026amp; Approvals\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eUL Listed, FM Approved\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eApplicable NFPA Standards\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eNFPA 13, NFPA 25\u003c\/td\u003e \u003c\/tr\u003e\n\u003c\/table\u003e \u003cp\u003eConfirm connection details, materials, operating limits, approvals, and application suitability against local Authority Having Jurisdiction (AHJ) requirements and the manufacturer's technical specifications before finalizing your parts order and beginning installation.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eDocumentation:\u003c\/strong\u003e \u003ca href=\"#\"\u003eDownload Manufacturer Technical Data \u0026amp; Cut Sheet (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Viking","offers":[{"title":"Default Title","offer_id":46372735713528,"sku":"22550","price":300.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0682\/7183\/3336\/files\/4-m2-ck-vlv-614137.png?v=1776006760","url":"https:\/\/fireprotectionparts.net\/products\/m2-4-inch-fire-service-check-valve-22550","provider":"Fire Protection Parts","version":"1.0","type":"link"}