Watts 774 NRS 4 Part of the 774 Series Hanes Geo ZN415J 2NH ZN415J 2NH Specifications Backflow Preventer Type Dual Check 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 Cap And Tether No Disc Material Silicone EAN 098268739213 Elbow Fitting No Hazard Protection Level Non Health Hazard Hot And Harsh Water No Hydrant Connection No Inlet Connection Size 1 1 4 IN Inlet Connection Size Metric 32 MM Inlet Connection Type Union Male Threaded Inlet Shutoff Valve Type No Shutoff Valve Inlet Thread Type NPT Lead Free YES Maximum Temperature Fahrenheit 180 Maximum Working Pressure BAR 10 horizontal 10 Maximum Working Pressure PSI 175 Meter Type No Meter Minimum Temperature Celsius 0