Watts LFM115 74 150 B 30 300 TC 20 200 4 Part of the LFM115 74 Series Sheet Drain Specifications Blowdown Outlet Connection Female Specifications Blowdown Outlet Connection Female Threaded Body Material Lead Free Cast Copper Silicon Alloy Body Pattern Wye Brand Watts Buy American Act Compliant NO EAN 098268657975 Gasket Material Garlock Inlet Connection Size 1 1 2 IN Inlet Connection Size Metric 40 MM Inlet Connection Type Female Threaded Inlet Thread Type NPT Lead Free YES Outlet Connection Size 1 1 2 IN Outlet Connection Type Female Threaded Outlet Thread Type FPT Part Number 0123114 Retainer Cover Material Lead Free Copper Silicon Alloy Retainer Cover Type Gasketed Cap Screen Material Stainless Steel Screen Size 100 MESH Series LF777 Strainer Type Wye Specification Sheet LF777 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 water supply due to backsiphonage and or backpressure The quick closing action of the valve limits the possibility of damaging high inlet pressure from passing through the valve to downstream piping pressure range of 30 300 psi