Watts SFBV 1 1 4 Part of the S FBV 1 Series Z100F 6NH This 1 2 inch hose connection This 1 2 inch hose connection vacuum breaker backflow preventer is designed specifically for tub and shower hand spray sets to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage The Watts FD 930 is a heavy duty floor drain engineered specifically for elevated parking structures using precast slabs 0 Outlet Connection Size 1 4 IN Outlet Connection Type Female Threaded Outlet Thread Type FPT Part Number 0548010 Port Type Full Seat Material PTFE Series S FBV 1 Stem Packing Material PTFE Stem Shaft Material Stainless Steel Stem Type Bottom Loaded Blowout Proof Thrust Washer Material PTFE Valve Style 2 piece WOG Rating 1000 PSI Specification Sheet S FBV 1 The temperature range is 0 to 400 degrees F ( 18 to 204 degrees C)