Watts 1 2 BD911S M3 Part of the BD911 Series snake fencing Z624 4NL Y Z624 4NL Y This valve automatically allows air to enter into the piping system to prevent vacuum conditions that could siphon water from the system and damage water equipment It has 1 2 inch union solder inlet x NPT threaded outlet connections Specifications Backflow Preventer Type Dual Check with Atmospheric Vent Body Finish Bronze Body Material Brass Body Pattern Straight Brand Watts Bypass No Bypass Size Does Not Apply To Product Cap And Tether No Disc Material Does Not Apply To Product EAN 098268114805 Elbow Fitting No Environmental Product Declaration No Hazard Protection Level Non Health Hazard Hot And Harsh Water No Hydrant Connection No Inlet Connection Size 1 2 IN Inlet Connection Size Metric 13 MM Inlet Connection Type Union Solder Inlet Shutoff Valve Type Does Not Apply To Product Inlet Thread Type Does Not Apply To Product Lead Free NO Maximum Temperature Fahrenheit 212 Maximum Working Pressure BAR 6