Watts 957 NRS FS 10 Part of the 957 Series silt fence selector Vinyl insulated standard Latch Lok handle Vinyl insulated standard Latch Lok handle to lock open or closed Specifications Body Material Bronze Brand Watts EAN 098268576764 Inlet Connection Size 3 4 IN Inlet Connection Type Female Threaded Inlet Thread Type NPTF Lead Free NO Maximum Working Pressure PSI 35 Outlet Connection Size 3 4 IN Outlet Connection Type Female Threaded Outlet Thread Type NPTF Part Number F274496 Pressure Range Does Not Apply To Product Pressure Relief Setting PSI 45 Series 174A Specification Sheet 174A torsion spring check valves This extremely compact and lighter than a traditional designed assembly is approved for horizontal installation in accordance with the direction of the flow arrow