Canplas 223284W 4 in. PVC DWV Backwater Valve Water Powered Backup Sump Pumps Do I need a vent Do I need a vent kit Specifications Backflow Preventer Type Reduced Pressure Zone Assembly Body Finish Cast Bronze Body Material Bronze Body Pattern Inline Brand Name Watts Bypass No Cap And Tether No Disc Material Silicone EANUCCCode 098268591781 Elbow Fitting No GDS Status Registered 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 NO Maximum Temperature Fahrenheit 180 Maximum Working Pressure BAR 12 It is commonly used for low level drain or basement plumbing backflow protection where approved by code It uses socket x socket DWV connections