Watts 757N OSY 4 Part of the 757 Series ZC100F 8NH Specifications Body Material Lead Free Specifications Body Material Lead Free Copper Silicon Alloy Brand Watts EAN 098268585209 Inlet Connection Size 1 2 IN Inlet Connection Type Male Threaded Inlet Thread Type NPT Lead Free YES Outlet Connection Size 1 2 IN Outlet Connection Type Female Threaded Outlet Thread Type FPT Part Number 0121444 Pressure Range 75 to 150 PSI Pressure Relief Setting PSI 175 Series LF53L Specification Sheet LF3L The Zurn Z450 finish floor drain is engineered to deliver reliable drainage while blending seamlessly into decorative interiors This 4 inch lead free double check valve backflow preventer assembly is designed to prevent the reverse flow of contaminated water of non potable quality from being pumped or siphoned into the potable contaminated water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and contaminated water authority requirements Features Stainless steel housing and sleeve