Watts TWS 8 Part of the TWS Series Sheet Drain This 1 2 inch dual check This 1 2 inch dual check valve backflow preventer with intermediate atmospheric vent helps prevent the reverse flow of hot or cold polluted water from entering into the potable water supply Specifications Actuation Yes Assembled Dry No Balance Stop Plate No Ball Material Brass Body Finish Brass Body Material Brass Brand Watts Buy American Act Compliant NO Control Type Lever Handle EAN 098268554755 Electrical Rating Does Not Apply To Product Inlet Connection Size 3 4 IN Inlet Connection Size Metric 20 MM Inlet Connection Type Female Threaded Inlet Thread Type NPT Lead Free NO Maximum Temperature Fahrenheit 406 Outlet Connection Size 3 4 IN Outlet Connection Type Female Threaded Outlet Thread Type FPT Part Number 0067771 Port Type Purge Seat Material PTFE Series PIPFM1 Stem Packing Material PTFE Stem Shaft Material Brass Stem Type Bottom Loaded Blowout Proof Thrust Washer Material PTFE WOG Rating 600 PSI Specification Sheet PIPFM1 Features Bronze body for durability winterizing and servicing of irrigation sprinkler systems