Watts LFF115 74 300 B 20 175 LS 50 145 3 Part of the LFF115 74 Series Z100F 4NH 50 Minimum Temperature Fahrenheit 33 Outlet 50 Minimum Temperature Fahrenheit 33 Outlet Connection Size 4 IN Outlet Connection Type Grooved Joint Outlet Shutoff Valve Type Outside Stem And Yoke Gate Valve Outlet Thread Type Does Not Apply To Product Part Number 0191597 Polymer Coating No Pressure Operation Continuous Protection Type Backpressure and Backsiphonage Seat Material Engineered Plastic Series 757DCDA Strainer No Technologies Does Not Apply To Product Tradename None Specification Sheet 757DCDA This pressure relief valve has a 2 inch NPTF female inlet and outlet and a 30 psi pressure relief setpoint configured with inlet and outlet gauge ports low flow by pass valve with 50 145 psi adjustment range