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Our most popular backflow preventer model, the 1-1/2" 975XL2S reduced pressure principle backflow preventer …. • Features an integrated flood sensor with SentryPlus Alert technology to detect excessive water discharges. 1-1/4-in Bronze FNPT Reduced Pressure Backflow Preventer. The 1" 720A Pressure Vacuum Breaker Assembly protects against backsiphonage in high health hazard, non-potable residential and commercial irrigation applications. The 3/4" Zurn Wilkins 975XL3 Reduced Pressure Principle Backflow Assembly provides high hazard protection …. Shop pressure vacuum breakers (PVB), double check assemblies (DCA), and backflow preventer valves. Join Prime to buy this item at $16. thong gif Prevent backflow and back-siphonage into potable water with a Zurn vacuum breaker. Shop Zurn Wilkins 6-in Ductile Iron Flanged Backflow Preventer at Lowe's. 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