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Watts 774 DOSY 4 Part of the 774 Series nwgf Specifications Backflow Preventer Type Vacuum Specifications Backflow Preventer Type Vacuum Breaker Body Finish Polished Chrome Body Material Lead Free Brass Body Pattern Straight Brand Watts Buy American Act Compliant NO Bypass No Bypass Size Does Not Apply To Product Cap And Tether No Disc Material Silicone EAN 098268434521 Elbow Fitting No Hazard Protection Level Health Hazard Hot And Harsh Water No Hydrant Connection No Inlet Connection Size 3 8 IN Inlet Connection Size Metric 10 MM Inlet Connection Type Female Threaded Inlet Shutoff Valve Type No Shutoff Valve Inlet Thread Type NPT Lead Free YES Maximum Temperature Fahrenheit 180 Maximum Working Pressure BAR 8 This 4 IN rubber parts kit for single check series 709 helps to prevent the reverse flow of polluted water from entering into the potable water supply