The 2-1/2 in 375OSY Reduced Pressure Principle Backflow Assembly, with OS and Y gate valves, is utilized where a potential high health hazard exists and is ideal for use when lead-free valves are required protecting against both back siphonage and backpressure of contaminated water into the potable water supply. The 375 includes an epoxy-coated inside and out ductile iron valve body eliminating exposure to corrosion. The 375 utilizes the Zurn® Wilkins low headloss Compound Check and offers the lowest lifecycle costs on the market.