Watts HPX 15D Part of the HPX Series Z100F 8NH The reason for this is The reason for this is so that surface roots can be quickly identified and clipped back Specifications Backflow Preventer Type Dual Check Body Finish Bronze Body Material Lead Free Brass Body Pattern Inline Brand Watts Bypass No Cap And Tether No Disc Material Santoprene EAN 098268533637 Elbow Fitting No Hazard Protection Level Non Health Hazard Hot And Harsh Water No Hydrant Connection No Inlet Connection Size 1 IN Inlet Connection Size Metric 25 MM Inlet Connection Type Female Threaded Inlet Shutoff Valve Type No Shutoff Valve Inlet Thread Type NHM Lead Free YES Maximum Temperature Fahrenheit 180 Maximum Working Pressure BAR 10 model FV4 M1 Expansion tank