{"product_id":"a-y-mcdonald-5421-107-swing-check-valve-1-1-4-in-sweat","title":"A.y. Mcdonald 5421-107 Swing Check Valve 1-1\/4 in Sweat","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe A.Y. MCDONALD 5421-107 is a 1-1\/4 inch sweat-connection swing check valve rated for 125 PSI service. It allows flow in one direction and closes automatically to prevent backflow when flow stops or reverses. The swing-type disc design provides low pressure drop during normal flow conditions. This valve is installed by licensed plumbers and HVAC-R technicians in water supply, heating, and general fluid-handling systems where backflow prevention is required at the line level.\u003c\/p\u003e\n\u003cp\u003eThis valve is suited for residential and light commercial plumbing and hydronic heating applications. The sweat-end connections are compatible with standard copper tubing, making it a straightforward drop-in for new installations or service replacements in closed-loop and open water systems. At 1-1\/4 inches, it fits branch and main-line configurations commonly found in baseboard heating loops, domestic water mains, and pump discharge lines.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSwing-disc design provides automatic backflow prevention without external actuation\u003c\/li\u003e\n  \u003cli\u003e1-1\/4 inch sweat (copper solder) end connections for standard copper tubing\u003c\/li\u003e\n  \u003cli\u003e125 PSI pressure class suitable for residential and light commercial service\u003c\/li\u003e\n  \u003cli\u003eCompact body weight of 1.14 pounds keeps installation practical in tight spaces\u003c\/li\u003e\n  \u003cli\u003ePassive operation with no power source or actuator required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation swing check valve for 1-1\/4 inch copper sweat piping systems in residential and light commercial plumbing and hydronic heating applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber in accordance with applicable local plumbing codes and the IPC. Shut off the water supply and depressurize the line before soldering. Observe the flow-direction arrow cast or stamped on the valve body and orient the valve accordingly during installation. Allow the valve body to cool fully after soldering before restoring system pressure to avoid heat damage to internal components.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Sweat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e: 1-1\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValve Type\u003c\/strong\u003e: Swing Check\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Class\u003c\/strong\u003e: 125 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.14 pounds\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: A.Y. MCDONALD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5421-107\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AY MCDONALD","offers":[{"title":"Default Title","offer_id":51233587757362,"sku":"5421-107","price":66.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/307632591.jpg?v=1780103980","url":"https:\/\/voomisupply.com\/products\/a-y-mcdonald-5421-107-swing-check-valve-1-1-4-in-sweat","provider":"Voomi Supply","version":"1.0","type":"link"}