{"product_id":"4-double-check-detector-with-fxg-osy-lf-fire-system","title":"4\" Double Check Detector With FXG OSY LF Fire System","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe 4\" Double Check Detector with FXG OS\u0026amp;Y LF Fire System is a specialized backflow preventer designed for commercial fire sprinkler systems. It combines reliable backflow prevention with precise flow detection, ensuring both water safety and effective fire system monitoring in one integrated device.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDurable Construction\u003c\/b\u003e: Built with ASTM A536 ductile iron and coated in fusion-bonded epoxy to withstand corrosive environments typical in mechanical rooms or underground installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCorrosion-Resistant Internal Components\u003c\/b\u003e: Features 300-series stainless steel springs and fasteners, enhancing longevity and performance in wet conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdvanced Check Valves\u003c\/b\u003e: Incorporates double check modules made from glass-filled Noryl™ thermoplastic for dimensional stability and durability under varying water pressures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReversible EPDM Seats\u003c\/b\u003e: Ensures a tight, leak-free seal with field-replaceable elastomer discs to extend service life and simplify maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIntegrated FXG OS\u0026amp;Y Flow Detector\u003c\/b\u003e: Provides accurate flow monitoring with a lever-operated valve and test ports, enabling quick isolation and easy testing without disrupting system function.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRegulatory Certifications\u003c\/b\u003e: UL Listed to UL 1469, FM Approved, ASSE 1015 compliant, and meets AWWA C510 standards, guaranteeing adherence to fire protection and plumbing safety codes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompliance with NFPA Standards\u003c\/b\u003e: Designed to support NFPA 13 and NFPA 25 requirements with pre-drilled test cocks for differential pressure and functionality testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWide Operating Range\u003c\/b\u003e: Rated for pressures up to 175 PSI and temperatures from 33°F to 140°F, suitable for typical fire sprinkler system environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFlexible Installation Options\u003c\/b\u003e: Compatible with ANSI B16.1 flanged or AWWA C606 grooved connections and supports both horizontal and vertical upward flow configurations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nBy integrating flow detection directly into the backflow preventer, this assembly eliminates the need for separate flow switches or monitors, reducing installation complexity and improving reliability. Its robust materials and certified design help prevent contamination of potable water supplies while providing timely alerts to sprinkler activation. This product is ideal for fire protection professionals seeking to meet rigorous safety standards without compromising system efficiency or maintenance access.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Fire Protection Parts","offers":[{"title":"Default Title","offer_id":43296155533402,"sku":"4A-60A-E7","price":4383.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/0637\/7818\/files\/8-double-check-detector-wgrooved-butterfly-valves-667767_d249068a-cde6-44e7-9660-5e739d78b77f.jpg?v=1777601744","url":"https:\/\/patriotsafesource.com\/products\/4-double-check-detector-with-fxg-osy-lf-fire-system","provider":"Patriot SafeSource","version":"1.0","type":"link"}