{"product_id":"caleffi-573403a-573-series-dual-check-backflow-preventer-with-atmospheric-vent-1-2-npt-asse-1012","title":"Caleffi 573403A 573 Series Dual Check Backflow Preventer with Atmospheric Vent 1\/2\" NPT, ASSE 1012","description":"\u003cp\u003eThe Caleffi 573403A is a 1\/2\" NPT dual check backflow preventer with intermediate atmospheric vent, listed to ASSE 1012. It keeps water from a heating or process system from flowing back into the potable water supply.\u003c\/p\u003e\u003cp\u003eASSE 1012 devices are commonly installed on the cold water make-up line to hydronic boilers and other low-hazard equipment connections. Two independent check valves and a vent chamber between them discharge water to atmosphere if backpressure or back-siphonage occurs.\u003c\/p\u003e\u003cp\u003eBefore ordering, confirm your 1\/2\" NPT line size and that local code accepts an ASSE 1012 device for the application; high-hazard connections typically require a reduced pressure zone (ASSE 1013) assembly. Allow for drainage from the vent port.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Caleffi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 573403A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 573\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Dual Check Backflow Preventer with Atmospheric Vent\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e 1\/2\" NPT threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Temperature:\u003c\/strong\u003e 210F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pressure:\u003c\/strong\u003e 175 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e ASSE 1012\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 8016615087604\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Backflow Preventers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDocuments\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/res.cloudinary.com\/dzhpkjoqj\/Caleffi\/573403A_CALE-573403A_8016615087604_TechB.pdf\" target=\"_blank\" rel=\"noopener\"\u003eTechnical Data Sheet\u003c\/a\u003e (PDF)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/res.cloudinary.com\/dzhpkjoqj\/Caleffi\/573403A_CALE-573403A_8016615087604_Inst.pdf\" target=\"_blank\" rel=\"noopener\"\u003eInstallation \u0026amp; Operation Manual\u003c\/a\u003e (PDF)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSee also: \u003ca href=\"\/collections\/backflow-preventers\"\u003ebackflow preventers\u003c\/a\u003e, \u003ca href=\"\/collections\/caleffi-north-america\"\u003eall Caleffi products\u003c\/a\u003e.\u003c\/p\u003e","brand":"Caleffi","offers":[{"title":"Default Title","offer_id":50517448065127,"sku":"CALE-573403A","price":98.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/2253\/3479\/files\/573403A_CALE-573403A_8016615087604.jpg?v=1792424461","url":"https:\/\/www.thehousesupplier.com\/products\/caleffi-573403a-573-series-dual-check-backflow-preventer-with-atmospheric-vent-1-2-npt-asse-1012","provider":"The House Supplier","version":"1.0","type":"link"}