{"title":"Backflow Devices - Watts - DCDA - Double Check Detector Assemblies - 4\" - 757DCDA Series","description":null,"products":[{"product_id":"4-lf757dcda-bfg-gpm","title":"4 LF757DCDA-BFG-GPM","description":"\u003cp\u003eThis \u003cstrong\u003e4 inch Lead Free Double Check Detector Backflow Preventer Assembly\u003c\/strong\u003e is designed to prevent the backflow of non-health hazard pollutants from entering the potable water supply system.\u003c\/p\u003e\u003cp\u003eIt is primarily used in \u003cstrong\u003efire line sprinkler systems\u003c\/strong\u003e where monitoring unauthorized water use is necessary, protecting against backpressure and backsiphonage under continuous pressure service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Free* construction\u003c\/strong\u003e, with wetted surfaces containing less than 0.25% lead by weight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e304 (Schedule 40) stainless steel\u003c\/strong\u003e housing and sleeve for corrosion resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtremely compact design\u003c\/strong\u003e, 70% lighter than traditional assemblies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrooved end connections\u003c\/strong\u003e for integral pipeline adjustment\u003c\/li\u003e\n\u003cli\u003eEquipped with \u003cstrong\u003eUL\/FM grooved gear operated butterfly valve shutoffs\u003c\/strong\u003e with tamper switches\u003c\/li\u003e\n\u003cli\u003eUnique \u003cstrong\u003etri-link spring check\u003c\/strong\u003e design provides lowest pressure loss\u003c\/li\u003e\n\u003cli\u003eUnmatched ease of serviceability with removable and serviceable check modules\u003c\/li\u003e\n\u003cli\u003eBypass assembly includes a \u003cstrong\u003emeter\u003c\/strong\u003e which registers in gallons or cubic measurement\u003c\/li\u003e\n\u003cli\u003eMay be used for \u003cstrong\u003ehorizontal, vertical, or N pattern installations\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReplaceable check disc rubber\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":49796723802389,"sku":"0122736","price":9229.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/180256.jpg?v=1772727717"},{"product_id":"4-lf757dcda-osy-gpm","title":"4 LF757DCDA-OSY-GPM","description":"\u003cp\u003eThis 4 inch \u003cstrong\u003eLead Free\u003c\/strong\u003e Double Check Detector Backflow Preventer Assembly with \u003cstrong\u003eOSY shutoff valves\u003c\/strong\u003e and a \u003cstrong\u003egallons per minute meter\u003c\/strong\u003e is designed to prevent backflow of non-health hazard pollutants into potable water supply systems. 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It is specifically designed for \u003cstrong\u003enon-health hazard applications\u003c\/strong\u003e where backsiphonage or backpressure could occur.\u003c\/p\u003e\u003cp\u003eThis assembly is ideal for protecting \u003cstrong\u003ecross-connections\u003c\/strong\u003e in fire protection systems and other service line entrances where non-toxic contaminants might be present.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Free* construction\u003c\/strong\u003e: Wetted surface contacted by consumable water contains less than 0.25% of lead by weight\u003c\/li\u003e\n\u003cli\u003eExtremely \u003cstrong\u003ecompact modular design\u003c\/strong\u003e with a single access cover for ease of maintenance\u003c\/li\u003e\n\u003cli\u003eApproximately \u003cstrong\u003e70% lighter\u003c\/strong\u003e than traditional designs for easier installation\u003c\/li\u003e\n\u003cli\u003eConstructed with \u003cstrong\u003e304 (Schedule 40) stainless steel housing and sleeve\u003c\/strong\u003e for durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGallons per minute (GPM) metered bypass\u003c\/strong\u003e for detecting underground leaks and unauthorized water use\u003c\/li\u003e\n\u003cli\u003eGroove fittings enable \u003cstrong\u003eintegral pipeline adjustment\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eUnique \u003cstrong\u003eTri-link check design\u003c\/strong\u003e provides the \u003cstrong\u003elowest pressure loss\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUngeared ease of serviceability\u003c\/strong\u003e, requiring no special tools\u003c\/li\u003e\n\u003cli\u003eIncludes \u003cstrong\u003edomestic OSY (Outside Stem and Yoke) resilient seated gate valves\u003c\/strong\u003e and captured spring check valves\u003c\/li\u003e\n\u003cli\u003eApproved for \u003cstrong\u003ehorizontal, vertical, or N pattern installations\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFeatures \u003cstrong\u003efour test cocks\u003c\/strong\u003e and replaceable check disc rubber\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":49796729864469,"sku":"0792292","price":16327.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/180480.jpg?v=1772727908"},{"product_id":"4-lf757ndcda-osy-gpm","title":"4 LF757NDCDA-OSY-GPM","description":"\u003cp\u003eThis \u003cstrong\u003e4 inch Lead Free Double Check Detector Backflow Preventer Assembly\u003c\/strong\u003e, featuring \u003cstrong\u003eOSY shutoff valves\u003c\/strong\u003e and a \u003cstrong\u003egallons per minute meter\u003c\/strong\u003e, is designed to prevent the backflow of non-health hazard pollutants into potable water supply systems. It is primarily used on \u003cstrong\u003efire sprinkler lines\u003c\/strong\u003e to monitor unauthorized water usage and is suitable for continuous pressure service against backpressure and backsiphonage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures \u0026amp; Construction\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Free\u003c\/strong\u003e construction ensures the wetted surface contains less than 0.25% lead by weight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtremely compact design\u003c\/strong\u003e, up to \u003cstrong\u003e70% lighter\u003c\/strong\u003e than traditional backflow preventers.\u003c\/li\u003e\n\u003cli\u003eDurable \u003cstrong\u003e304 Schedule 40 stainless steel\u003c\/strong\u003e housing and sleeve.\u003c\/li\u003e\n\u003cli\u003eEquipped with \u003cstrong\u003eUL\/FM outside stem and yoke (OSY) resilient seated gate valves\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eIncludes a \u003cstrong\u003egallons per minute meter\u003c\/strong\u003e for monitoring water flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGroove fittings\u003c\/strong\u003e allow for integral pipeline adjustment.\u003c\/li\u003e\n\u003cli\u003eUnique \u003cstrong\u003etri-link spring checks\u003c\/strong\u003e offer lowest pressure loss and unmatched ease of serviceability.\u003c\/li\u003e\n\u003cli\u003eApproved for \u003cstrong\u003ehorizontal, vertical, or N pattern installations\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eFeatures \u003cstrong\u003ereversible elastomer discs\u003c\/strong\u003e for drip-tight closure.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":49796737171733,"sku":"0124700","price":14448.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/180752.jpg?v=1772728130"},{"product_id":"4-lf757dcda-dosy-gpm","title":"4 LF757DCDA-DOSY-GPM","description":"\u003cp\u003eThe Watts Series LF757DCDA Lead Free Double Check Detector Backflow Preventer Assembly, 4 inch with \u003cstrong\u003eDomestic OSY Shutoff Valves\u003c\/strong\u003e and a \u003cstrong\u003egallons\/minute meter\u003c\/strong\u003e, is designed to prevent the backflow of non-health hazard pollutants into the potable water supply system.\u003c\/p\u003e\u003cp\u003eIt is primarily used in \u003cstrong\u003efire line sprinkler systems\u003c\/strong\u003e where monitoring for unauthorized water use is necessary, and for cross-connections involving non-health hazards such as fire protection systems and other service line contaminants.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Free* construction\u003c\/strong\u003e ensures the wetted surface contains less than 0.25% lead by weight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtremely compact design\u003c\/strong\u003e, up to 70% lighter than traditional models.\u003c\/li\u003e\n\u003cli\u003eDurable \u003cstrong\u003e304 Schedule 40 stainless steel housing and sleeve\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGroove fittings\u003c\/strong\u003e allow for integral pipeline adjustment.\u003c\/li\u003e\n\u003cli\u003eUnique \u003cstrong\u003etri-link spring check\u003c\/strong\u003e design provides the \u003cstrong\u003elowest pressure loss\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnmatched ease of serviceability\u003c\/strong\u003e without special tools.\u003c\/li\u003e\n\u003cli\u003eAvailable with \u003cstrong\u003egrooved butterfly valve shutoffs\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eCan be installed in \u003cstrong\u003ehorizontal, vertical, or N pattern\u003c\/strong\u003e orientations.\u003c\/li\u003e\n\u003cli\u003eEquipped with a \u003cstrong\u003egallons per minute metered bypass\u003c\/strong\u003e to detect underground leaks and unauthorized water use.\u003c\/li\u003e\n\u003cli\u003eFeatures \u003cstrong\u003ereversible elastomer check discs\u003c\/strong\u003e and \u003cstrong\u003efour test cocks\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eNOTICE: The information provided is not a substitute for full product installation and safety information. You are required to thoroughly read all installation instructions and product safety information before installing this product. Inquire with governing authorities for local installation requirements.\u003c\/em\u003e\u003c\/p\u003e","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":49796746969365,"sku":"0792280","price":11513.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/181044.jpg?v=1772728364"},{"product_id":"watts-4-lf757dcda-osy-cfm-double-check-detector-assembly-lead-free-osy-shutoff-valves-cubic-feet-meter-35441","title":"Watts® 4\" LF757DCDA-OSY-CFM Double Check Detector Assembly, Lead-Free, OSY Shutoff Valves, Cubic Feet Meter","description":"","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50124150374677,"sku":"0122711","price":10184.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/191910.jpg?v=1788377320"},{"product_id":"watts-4-lf757dcda-bfg-cfm-double-check-detector-assembly-lead-free-ulfm-butterfly-valve-shutoffs-cubic-feet-meter-35486","title":"Watts® 4\" LF757DCDA-BFG-CFM Double Check Detector Assembly, Lead-Free, UL\/FM Butterfly Valve Shutoffs, Cubic Feet Meter","description":"","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50124157026581,"sku":"0122731","price":10504.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/191916.jpg?v=1788377663"},{"product_id":"watts-4-lf757dcda-osy-lm-double-check-detector-assembly-lead-free-osy-shutoff-valves-less-meter-35494","title":"Watts® 4\" LF757DCDA-OSY-LM Double Check Detector Assembly, Lead-Free, OSY Shutoff Valves, Less Meter","description":"","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50124158206229,"sku":"0124723","price":10008.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/192009.jpg?v=1788441885"},{"product_id":"watts-4-lf757dcda-dosy-cfm-double-check-detector-assembly-lead-free-domestic-osy-shutoff-valves-cubic-feet-meter-35288","title":"Watts® 4\" LF757DCDA-DOSY-CFM Double Check Detector Assembly, Lead-Free, Domestic OSY Shutoff Valves, Cubic Feet Meter","description":"","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50124189368597,"sku":"0124728","price":11513.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/192012.jpg?v=1788443062"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-osy-shutoff-valves-cubic-feet-meter-36442","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, OSY Shutoff Valves, Cubic Feet Meter","description":"This 4\" double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check valves, two shutoff valves, and four test cocks. It has a cubic foot meter. It features a stainless steel housing and sleeve and is 70 percent lighter than traditional designs. It is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water. The maximum working pressure is 175 psi (12.06 bar).","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164270399765,"sku":"DDP0111546","price":9300.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193351.jpg?v=1789499931"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-ulfm-butterfly-valve-shutoffs-cubic-feet-meter-36443","title":"Watts 4\" 757DCDA Double Check Detector Assembly, UL\/FM Butterfly Valve Shutoffs, Cubic Feet Meter","description":"This 4\" double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check valves, two UL\/FM butterfly shutoff valves, and four test cocks. It has a cubic foot meter. It features a stainless steel housing and sleeve and is 70 percent lighter than traditional designs. It is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water. The maximum working pressure is 175 psi (12.06 bar).","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164270530837,"sku":"DDP0111570","price":9813.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193352.jpg?v=1789500025"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-ulfm-butterfly-valve-shutoffs-cubic-feet-meter-n-pattern-36504","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, UL\/FM Butterfly Valve Shutoffs, Cubic Feet Meter, N Pattern","description":"This 4\", N pattern, double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check valves, two UL\/FM butterfly shutoff valves, and four test cocks. It has a cubic foot meter. It features a stainless steel housing and sleeve and is 70 percent lighter than traditional designs. It is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water. The maximum working pressure is 175 psi (12.06 bar).","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164280262933,"sku":"DDP0111578","price":13727.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193717.jpg?v=1789648444"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-ulfm-butterfly-valve-shutoffs-gallonsminute-meter-n-pattern-36505","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, UL\/FM Butterfly Valve Shutoffs, Gallons\/Minute Meter, N Pattern","description":"This 4\", N pattern, double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check valves, two UL\/FM butterfly shutoff valves, and four test cocks. It has a gallons per minute meter. It features a stainless steel housing and sleeve and is 70 percent lighter than traditional designs. It is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water. The maximum working pressure is 175 psi (12.06 bar).","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164280394005,"sku":"DDP0111582","price":13727.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193718.jpg?v=1789648492"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-post-indicator-valve-x-osy-shutoff-valve-gallonsminute-meter-36511","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, Post Indicator Valve x OSY Shutoff Valve, Gallons\/Minute Meter","description":"This 4\" stainless steel double check detector backflow preventer assembly with a post indicator valve, outside stem and yoke resilient seated gate valves and a gallons per minute meter measures water flow to detect ground leaks and unauthorized taps. Primarily used on fire line sprinkler systems at referenced cross-connections identified as non-health hazard continuous pressure applications, it prevents the backflow of fire protection substances into the potable water supply and protects against backsiphonage and backpressure. The easy maintenance assembly consists of positive seated thermoplastic independently operating torsion spring check modules, outside stem and yoke resilient seated gate valves with tamper switch and top mounted test cocks. The temperature range is 33 to 140 degrees F (0.5 to 60 degrees C). The maximum working pressure is 175 psi (12.1 bar).","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164281409813,"sku":"DDP0191613","price":9300.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193725.jpg?v=1789649208"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-domestic-osy-shutoff-valves-cubic-feet-meter-36519","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, Domestic OSY Shutoff Valves, Cubic Feet Meter","description":"This 4\" double check detector backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality, but not toxic, from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. It is ideal for protection at cross-connections identified as non-health hazards such as on fire protection systems and from other contaminants found at the service line entrance. This compact modular design with a single access cover for easy maintenance is approved for horizontal and vertical flow up installation. It consists of a light weight stainless steel body and sleeve, domestic outside stem and yoke resilient seated gate valves, captured spring check valves, a cubic feet per minute metered bypass to detect underground leaks and unauthorized water use, and four test cocks.","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164282786069,"sku":"DDP0113012","price":10505.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193733.jpg?v=1789649944"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-osy-shutoff-valves-flanged-inlet-x-groove-outlet-cubic-feet-meter-36520","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, OSY Shutoff Valves, Flanged Inlet x Groove Outlet, Cubic Feet Meter","description":"This 4\" double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. It is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water and includes a cubic feet per minute meter that measures water flow. This assembly consists of two independently operating tri-link check valves, two shutoff valves, four test cocks, and UL\/FM outside stem and yoke resilient seated gate valves with flanged by grooved end connections. It features a compact stainless steel housing and sleeve that is 70 percent lighter than traditional designs. The maximum working pressure is 175 psi (12.06 bar).","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164282917141,"sku":"DDP0191597","price":9300.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193734.jpg?v=1789649997"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-osy-shutoff-valve-x-post-indicator-valve-gallonsminute-meter-36521","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, OSY Shutoff Valve x Post Indicator Valve, Gallons\/Minute Meter","description":"This 4\" stainless steel double check detector backflow preventer is a crucial component in safeguarding potable water from contamination. Used primarily in fire line sprinkler systems where it prevents the backflow of fire suppression materials into the potable water supply, its installation is typically mandated by local authorities in areas identified as non-health hazard continuous pressure applications. It has outside stem and yoke resilient seated gate valves and a gallons per minute meter that measures water to detect unauthorized water usage and ground leaks. The post indicator valve allows for easy visual confirmation if the valve is open or closed.","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164283048213,"sku":"DDP0111212","price":9762.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193735.jpg?v=1789650034"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-osy-shutoff-valves-without-meter-36530","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, OSY Shutoff Valves, Without Meter","description":"This 4\" double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check valves, two shutoff valves, and four test cocks. It features a stainless steel housing and sleeve and is 70 percent lighter than traditional designs. It is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water. The maximum working pressure is 175 psi (12.06 bar).","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164284719381,"sku":"DDP0111839","price":9140.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193744.jpg?v=1789650502"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-osy-shutoff-valves-gallonsminute-meter-36536","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, OSY Shutoff Valves, Gallons\/Minute Meter","description":"This 4\" double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check valves, two shutoff valves, and four test cocks. It has a gallons per minute meter. It features a stainless steel housing and sleeve and is 70 percent lighter than traditional designs. It is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water. The maximum working pressure is 175 psi (12.06 bar).","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164285735189,"sku":"DDP0111552","price":9300.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193750.jpg?v=1789650866"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-ulfm-butterfly-valve-shutoffs-gallonsminute-meter-36538","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, UL\/FM Butterfly Valve Shutoffs, Gallons\/Minute Meter","description":"This 4\" double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check valves, two UL\/FM butterfly shutoff valves, and four test cocks. It has a gallons per minute meter. It features a stainless steel housing and sleeve and is 70 percent lighter than traditional designs. It is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water. The maximum working pressure is 175 psi (12.06 bar).","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164286030101,"sku":"DDP0111574","price":9813.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193752.jpg?v=1789650955"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-osy-shutoff-valves-cubic-feet-meter-n-pattern-36565","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, OSY Shutoff Valves, Cubic Feet Meter, N Pattern","description":"This 4\", N pattern, double check detector backflow preventer assembly prevents the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check valves, two shutoff valves, and four test cocks. It has a cubic foot meter. It features a stainless steel housing and sleeve and is 70 percent lighter than traditional designs. It is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. It is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water. The maximum working pressure is 175 psi (12.06 bar).","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164291535125,"sku":"DDP0111558","price":13188.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193779.jpg?v=1789652446"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-domestic-osy-shutoff-valves-gallonsminute-meter-36567","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, Domestic OSY Shutoff Valves, Gallons\/Minute Meter","description":"This 4\" double check detector backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality, but not toxic, from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. It is ideal for protection at cross-connections identified as non-health hazards such as on fire protection systems and from other contaminants found at the service line entrance. This compact modular design with a single access cover for easy maintenance is approved for horizontal and vertical flow up installation. It consists of a light weight stainless steel body and sleeve, domestic outside stem and yoke resilient seated gate valves, captured spring check valves, a gallons per minute metered bypass to detect underground leaks and unauthorized water use, and four test cocks.","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164291895573,"sku":"DDP0113016","price":10505.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193489.jpg?v=1789568450"},{"product_id":"watts-4-757dcda-double-check-detector-assembly-backflow-preventer-domestic-osy-shutoff-valves-gallonsminute-meter-n-pattern-36580","title":"Watts 4\" 757DCDA Double Check Detector Assembly Backflow Preventer, Domestic OSY Shutoff Valves, Gallons\/Minute Meter, N Pattern","description":"This 4\" N pattern double check detector backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality, but not toxic, from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. It is ideal for protection at cross-connections identified as non-health hazards such as on fire protection systems and from other contaminants found at the service line entrance. This compact modular design with a single access cover for easy maintenance is approved for horizontal and vertical flow up installation. It consists of a light weight stainless steel body and sleeve, domestic outside stem and yoke resilient seated gate valves, captured spring check valves, a gallons per minute metered bypass to detect underground leaks and unauthorized water use, and four test cocks.","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":50164294779157,"sku":"DDP0113024","price":14901.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/193505.jpg?v=1789569325"}],"url":"https:\/\/www.backflowpreventer.com\/collections\/backflow-devices-watts-dcda-double-check-detector-assemblies-4-757dcda-series.oembed","provider":"Water Specialties Company","version":"1.0","type":"link"}