{"product_id":"nibco-nln50xk-silent-wafer-check-valve-6-in-250-cwp","title":"Nibco nln50xk Silent Wafer Check Valve 6 in 250 Cwp","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe NIBCO nln50xk is a 6-inch lead-free cast iron dual disc silent wafer check valve designed to prevent backflow in piping systems. Rated at 250 CWP (cold working pressure) and classified under Class 125, this valve uses a Buna-N seat to provide a reliable, low-maintenance seal. The dual disc silent design minimizes water hammer by closing before flow reversal, making it well suited for commercial and industrial water service applications. Installation is handled by licensed plumbers and pipefitters working on pressurized fluid systems.\u003c\/p\u003e\u003cp\u003eThis valve fits between standard pipe flanges in a wafer-style configuration, requiring no additional valve body flanges for mounting. The 6-inch size and cast iron body make it appropriate for larger-diameter water distribution, HVAC hydronic systems, and similar fluid handling applications where backflow prevention is required. Its lead-free construction meets applicable requirements for potable water service.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDual disc silent check design minimizes water hammer on flow reversal\u003c\/li\u003e\n\u003cli\u003eLead-free cast iron body meets potable water compliance requirements\u003c\/li\u003e\n\u003cli\u003eBuna-N seat provides a durable, resilient sealing surface\u003c\/li\u003e\n\u003cli\u003eClass 125 rated at 250 CWP for pressurized commercial and industrial service\u003c\/li\u003e\n\u003cli\u003eWafer-style body installs between flanges without additional end connections\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation wafer check valve for 6-inch flanged piping systems in commercial plumbing, HVAC hydronic, and industrial water service applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\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 completely before removing any existing valve or inserting this check valve between flanges. Verify flange bolt pattern and gasket compatibility before torquing hardware. Confirm flow direction arrow on the valve body aligns with the intended flow path prior to final assembly.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat Material\u003c\/strong\u003e: Buna-N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold Working Pressure (CWP)\u003c\/strong\u003e: 250 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Class\u003c\/strong\u003e: Class 125\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Free\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Type\u003c\/strong\u003e: Wafer\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: nln50xk\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NIBCO","offers":[{"title":"Default Title","offer_id":51233523859762,"sku":"NLN50XK","price":1448.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/307629429.jpg?v=1780102196","url":"https:\/\/voomisupply.com\/products\/nibco-nln50xk-silent-wafer-check-valve-6-in-250-cwp","provider":"Voomi Supply","version":"1.0","type":"link"}