RPZ backflow preventervs double-check valve

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RPZ Backflow preventerdiagram

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The Zurn Wilkins 975XL3 Reduced Pressure Principle Backflow Assembly provides high hazard protection against backsiphonage and backpressure in potable water applications. The 975XL3 series offers the most compact and lightest bronze small backflow available on the market today. The design combines the robust time-tested construction of our 975XL/XL2 series with the innovative modular check EZSwap® design of our 375 series allowing for ease of repair and greater labor savings compared to all other brands.