{"product_id":"zurn-1-420xl","title":"Zurn 1-420XL Lead-Free Pressure Vacuum Breaker Assembly with Integral Anti-Freeze Relief Valve","description":"\u003cp\u003eThe Zurn Wilkins 1-420XL is a 1\" lead-free pressure vacuum breaker with FNPT connections, approved for high health hazard protection. It features a stainless body. Rated to 175 psi and up to 140°F. This model is certified lead-free for potable-water installations.\u003c\/p\u003e\u003cp\u003eThe 420XL Pressure Vacuum Breaker Assembly is used for high health hazard, residential irrigation and potable water applications for protection against backsiphonage of contaminated water into the potable water supply. The 420XL is equipped with an internal, integral anti-freeze relief valve to reduce the risk of costly valve damage in intermittent, non-seasonal freezing conditions. It is best used under continuous pressure, and features a modular design to reduce repair time and costs. Its low-lead cast bronze main valve body and 300 series stainless steel springs effectively resist corrosion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eModular design elements ease repair costs and time\u003c\/li\u003e\n\u003cli\u003eIntegral anti-freeze relief valve provides light freeze protection\u003c\/li\u003e\n\u003cli\u003eCast bronze body and stainless steel springs resist corrosion\u003c\/li\u003e\n\u003cli\u003e1-year limited warranty\u003c\/li\u003e\n\u003cli\u003eASSE® Listed 1020\u003c\/li\u003e\n\u003cli\u003eCSA® Certified B64.1.2\u003c\/li\u003e\n\u003cli\u003eApproved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat hazard level is this PVB approved for?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eIt is rated for high health hazard (toxic) cross-connections, but only against backsiphonage. The assembly is listed to ASSE 1020.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs this model legal for potable water?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. It is certified lead-free to NSF\/ANSI 372, which is what state plumbing codes require for any device in a drinking-water line.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDoes this assembly have to be tested every year?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. This is a field-testable assembly. Most water authorities require it to be tested and certified by a licensed backflow tester at installation and annually thereafter. It carries USC FCCCHR approval, which many jurisdictions accept as their sole approval list.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWill this protect against backpressure?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo. A pressure vacuum breaker protects against backsiphonage only. It will not stop backflow caused by backpressure -- a downstream pump, elevated piping or a boiler -- which requires a double check or RPZ assembly instead.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eHow does this have to be installed?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eIt must be installed vertically (upright), above the highest downstream outlet, per its installation instructions and ASSE listing.\u003c\/dd\u003e\n\u003c\/dl\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Pressure Vacuum Breaker Assembly with Integral Anti-Freeze Relief Valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e FNPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Stainless\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Pressure (psi):\u003c\/strong\u003e 175\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Irrigation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackflow Protection:\u003c\/strong\u003e Backsiphonage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e 1-420XL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e up to 140°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e ASSE-1020, CSA-B64.1.2, USC, NSF-372, IAPMO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Free:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly Type:\u003c\/strong\u003e PVB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHazard Protection Level:\u003c\/strong\u003e High Health Hazard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASSE Standard:\u003c\/strong\u003e ASSE 1020\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSC FCCCHR Approved:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField Testable:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproved Orientation:\u003c\/strong\u003e Vertical\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Zurn","offers":[{"title":"Default Title","offer_id":55656212169003,"sku":"1-420XL","price":331.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0277\/3168\/9577\/files\/420XL.jpg?v=1790042384","url":"https:\/\/citysupplygroup.com\/products\/zurn-1-420xl","provider":"City Supply","version":"1.0","type":"link"}