{"product_id":"caleffi-574151a-574-combo-autofill-rpz-backflow-preventer-fill-valve-3-4-npt-with-pressure-gauge-asse-1013-low-lead","title":"Caleffi 574151A 574 COMBO AutoFill RPZ Backflow Preventer \u0026 Fill Valve 3\/4\" NPT with Pressure Gauge, ASSE 1013, Low Lead","description":"\u003cp\u003eThe Caleffi 574151A COMBO AutoFill combines an ASSE 1013 reduced pressure zone (RPZ) backflow preventer and an automatic fill valve in one 3\/4\" NPT low lead brass body with a pressure gauge. It fills and maintains pressure in closed hydronic systems where a higher level of backflow protection is required.\u003c\/p\u003e\u003cp\u003eRPZ protection is typically required where the heating system water is treated with chemicals such as glycol antifreeze or corrosion inhibitors. Combining the RPZ and the fill valve in one unit reduces the space and the number of connections on the boiler make-up line.\u003c\/p\u003e\u003cp\u003eBefore ordering, confirm the 3\/4\" NPT connections and your local code requirements for RPZ devices, including testing and the need for a drain at the relief port. Check the installation manual for the fill pressure adjustment range.\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 574151A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 574 COMBO AutoFill\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e RPZ Backflow Preventer and Automatic Fill Valve Combination\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e 3\/4\" NPT threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Temperature:\u003c\/strong\u003e 140F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pressure:\u003c\/strong\u003e 140 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Low lead brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Pressure Gauge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e ASSE 1013\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 8016615576399\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e System Fill Tanks \u0026amp; Autofills\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\/574151A_CALE-574151A_8016615576399_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\/574151A_CALE-574151A_8016615576399_Inst.pdf\" target=\"_blank\" rel=\"noopener\"\u003eInstallation \u0026amp; Operation Manual\u003c\/a\u003e (PDF)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/res.cloudinary.com\/dzhpkjoqj\/Caleffi\/574151A_CALE-574151A_8016615576399_Sub.pdf\" target=\"_blank\" rel=\"noopener\"\u003eSubmittal Sheet\u003c\/a\u003e (PDF)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSee also: \u003ca href=\"\/collections\/system-fill-tanks-autofills\"\u003esystem fill tanks \u0026amp; autofills\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":50517452357735,"sku":"CALE-574151A","price":587.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/2253\/3479\/files\/574151A_CALE-574151A_8016615576399.jpg?v=1792424626","url":"https:\/\/www.thehousesupplier.com\/products\/caleffi-574151a-574-combo-autofill-rpz-backflow-preventer-fill-valve-3-4-npt-with-pressure-gauge-asse-1013-low-lead","provider":"The House Supplier","version":"1.0","type":"link"}