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Watts LF709 DOSY 8 Part of the LF709 Series Z100F 3NH This 3 4 inch lead free This 3 4 inch lead free pressure vacuum breaker backflow preventer prevents the reverse flow of polluted water from entering into the potable water supply due to backsiphonage 50 Minimum Temperature Fahrenheit 33 Outlet Connection Size 1 1 4 IN Outlet Connection Type Female Threaded Outlet Shutoff Valve Type Quarter Turn Ball Valve Outlet Thread Type NPT Part Number 88004126 Polymer Coating No Pressure Operation Continuous Protection Type Backpressure and Backsiphonage Seat Material Stainless Steel Series 009 Strainer No Technologies Flood Detection Tradename None Field Guide Backflow Preventer Repair Parts 007 and 009