Watts ETA 144 Part of the ETA Series ZC100F 4NH Specifications ArmorTek Technology No Backflow Specifications ArmorTek Technology No Backflow Preventer Type Reduced Pressure Zone 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 No Disc Material Silicone EAN 098268349979 Elbow Fitting No Hazard Protection Level Health Hazard Hot And Harsh Water No Hydrant Connection No Inlet Connection Size 2 IN Inlet Connection Size Metric 50 MM 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 ZN1402 6NL This 80 gallon pressurized expansion tank is designed to absorb the expansion forces and control the pressure in heating and cooling systems The excess water is contained in the heavy duty butyl bladder preventing tank corrosion and waterlogging problems