{"product_id":"4-deringer-20g-dc","title":"4 DERINGER 20G (DC)","description":"\u003cp\u003eThis 4 inch Ames Deringer™ 20G double check valve backflow preventer assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backpressure and\/or backsiphonage conditions. It features a robust 304 stainless steel body with inline serviceable OS\u0026amp;Y shutoff valves and patented Dual-action™ check modules for high performance at low and high flow rates.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eInline serviceable gate valves\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eStainless steel housing\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTamper-resistant test cocks\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003ePatented \u003cstrong\u003eDual-action™ check modules\u003c\/strong\u003e:\u003cul\u003e\n\u003cli\u003ePoppet action at low flow\u003c\/li\u003e\n\u003cli\u003eSwing action at high flow\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSilicone elastomer check discs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eStem includes \u003cstrong\u003etamper switch groove\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAWWA C509\/UL\/FM resilient seated gate valves (OS\u0026amp;Y)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFlanged end ANSI B16.1 Class125\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible groove coupling UL\/FM\u003c\/strong\u003e (between body and gate valves)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eDesign \u0026amp; Operation\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eUtilizes two independent Dual-action check modules contained within a single valve housing.\u003c\/li\u003e\n\u003cli\u003eCheck modules operate as a poppet style under low flow and swing style under high flow conditions.\u003c\/li\u003e\n\u003cli\u003eFeatures replaceable \u003cstrong\u003esilicone elastomer sealing discs\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eAssembly includes two resiliently seated, inline serviceable AWWA C509 gate valves (OS\u0026amp;Y type) with stainless steel stems.\u003c\/li\u003e\n\u003cli\u003eGate valves include a stainless steel stem with pre-machined groove for supervisory tamper switch installation.\u003c\/li\u003e\n\u003cli\u003eTest cocks are handle-less and operate via a tamper resistant actuator.\u003c\/li\u003e\n\u003cli\u003eSingle full access service port and cover with an inline replaceable elastomer cover seal.\u003c\/li\u003e\n\u003cli\u003eAssembly is serviceable without special tools and approved for both \u003cstrong\u003ehorizontal\u003c\/strong\u003e and \u003cstrong\u003evertical applications\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Water Specialties Company","offers":[{"title":"Default Title","offer_id":49796664426773,"sku":"D-4020G","price":5671.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/6506\/6773\/files\/178296.jpg?v=1772726108","url":"https:\/\/www.backflowpreventer.com\/products\/4-deringer-20g-dc","provider":"Water Specialties Company","version":"1.0","type":"link"}