Watts 957NRPDA BFG CFM FS 4 Part of the 957RPDA Series Window Well Cover ZN1901 4NL ZN1901 4NL Specifications ArmorTek Technology No Backflow Preventer Type Double Check Valve Assembly Body Finish Cast Copper Silicon Alloy Body Material Lead Free Copper Silicon Alloy Body Pattern Inline Brand Watts Buy American Act Compliant YES Bypass No Bypass Size Does Not Apply To Product Cap And Tether Yes Disc Material Rubber EAN 098268592870 Elbow Fitting No Hazard Protection Level Non Health Hazard Hot And Harsh Water No Hydrant Connection No Inlet Connection Size 2 IN Inlet Connection Type Female Threaded Inlet Shutoff Valve Type Quarter Turn Ball Valve Inlet Thread Type NPT Lead Free YES Maximum Temperature Fahrenheit 180 Maximum Working Pressure BAR 12 Approved for horizontal N pattern installation corrosive resistant bottom mounted pressure relief valve and comes furnished with a cubic foot per minute meter to detect underground leaks and unauthorized water use