Febco 765 QT PVB 3 4 Part of the 765 Series American Wick Drain 50 Minimum Temperature Fahrenheit 33 Outlet 50 Minimum Temperature Fahrenheit 33 Outlet Connection Size 4 IN Outlet Connection Type Does Not Apply To Product Outlet Shutoff Valve Type Outside Stem And Yoke Gate Valve Outlet Thread Type Does Not Apply To Product Part Number 0113046 Polymer Coating No Pressure Operation Continuous Protection Type Backpressure and Backsiphonage Series 957 Strainer No Technologies Does Not Apply To Product Tradename None Specification Sheet 957 1 2 IN purge port This 3 4 inch pressure vacuum breaker backflow preventer is used to protect against health hazard and non hazard backsiphonage of toxic or non toxic liquids in industrial plants two resilient seated shutoffs and test cocks