{"product_id":"2-1-2-backflow-preventor-valve-reduced-pressure-assembly-os-y-valve-ductile-iron","title":"2-1\/2\" Backflow Preventor Valve Reduced Pressure Assembly OS\u0026Y Valve Ductile Iron","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications (Material Focus)\u003c\/strong\u003e\u003cbr\u003e\nThe 2-1\/2\" Reduced Pressure Assembly with OS\u0026amp;Y valve is engineered with a robust ductile iron body complying with ASTM A536 standards, optimized for residential fire protection systems. Internal components consist of stainless steel springs and fasteners—specifically from the 300 series—to resist corrosion and ensure longevity under varied environmental conditions. The assembly incorporates high-grade EPDM elastomer seating for reliable, reversible sealing against backflow. The OS\u0026amp;Y (Outside Stem and Yoke) gate valve is crafted from cast iron with a rising stem design, facilitating straightforward operation and visual status indication.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eRegulatory Compliance\u003c\/strong\u003e\u003cbr\u003e\nThis assembly is manufactured to comply with essential regulatory standards necessary for residential fire sprinkler systems. It meets UL 312 certification for backflow prevention assemblies, ensuring it successfully prevents contamination of potable water supplies. Additionally, it satisfies ASSE 1013 standards specific to reduced pressure principle backflow preventers. The unit aligns with NFPA 13 and NFPA 25 codes, underpinning its suitability for standard installation, inspection, and maintenance requirements in residential fire protection setups.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eOperational Compatibility\u003c\/strong\u003e\u003cbr\u003e\nRated for a maximum working pressure of 175 PSI (12.1 bar), the assembly supports the typical residential water pressure range without performance loss. The device maintains operational integrity within a temperature range of 33°F to 140°F (0.5°C to 60°C), accommodating typical domestic water temperatures. Connection interfaces feature a 2-1\/2\" National Pipe Thread (NPT) configuration and flange options compliant with ANSI B16.1 standards, allowing for flexible integration with existing fire service piping layouts. The OS\u0026amp;Y valve's rising stem facilitates easy system isolation during maintenance while providing clear status feedback.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eUse Cases and Practical Insights\u003c\/strong\u003e\u003cbr\u003e\nIdeal for residential fire protection applications, this reduced pressure assembly prevents backflow contamination in fire sprinkler systems fed by potable water lines. Its design is tailored for homeowners and residential property managers seeking reliable, code-compliant safeguards without the complexity of commercial-grade devices. The OS\u0026amp;Y gate valve supports routine operational testing and maintenance without requiring full system shutdown, minimizing downtime. Compared to alternative assemblies lacking OS\u0026amp;Y valves, this product enhances operational visibility and serviceability, reducing long-term maintenance costs.\u003c\/p\u003e \u003cp\u003eThe assembly robustly counters common backflow issues such as pressure fluctuations and potential pollutant ingress from auxiliary water sources, ensuring continuous protection of potable water supplies. Its capacity to resist harsh environmental conditions also makes it suitable for installation in both interior mechanical rooms and protected exterior enclosures.\u003c\/p\u003e \u003cp\u003eFor optimal performance, it is recommended to install the assembly in an accessible location to facilitate regular annual testing mandated by NFPA 25. The unit’s durable construction supports longevity even in demanding residential fire system environments, providing a dependable line of defense against contamination risks.\u003c\/p\u003e \u003cbr\u003e \u003ctable id=\"product-attribute-specs-table\" class=\"data table additional-attributes\"\u003e\n\u003ccaption class=\"table-caption\"\u003eMore Information\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" class=\"col label\"\u003eItem Number\u003c\/th\u003e\n\u003ctd data-th=\"Item Number\" class=\"col data\"\u003eM400NOSY-0250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" class=\"col label\"\u003eBrand\u003c\/th\u003e\n\u003ctd data-th=\"Brand\" class=\"col data\"\u003eAmes Backflows\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" class=\"col label\"\u003eBox Quantity\u003c\/th\u003e\n\u003ctd data-th=\"Box Quantity\" class=\"col data\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Fire Protection Parts","offers":[{"title":"Default Title","offer_id":43296161431642,"sku":"C400NOSY-0250","price":4856.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/0637\/7818\/files\/10-reduced-pressure-backflow-assembly-wosy-flangexgrooved-659065_723d69da-1310-4c7e-bb9b-8ba0afeb9961.jpg?v=1777601919","url":"https:\/\/patriotsafesource.com\/products\/2-1-2-backflow-preventor-valve-reduced-pressure-assembly-os-y-valve-ductile-iron","provider":"Patriot SafeSource","version":"1.0","type":"link"}