WATTS® Pressure Reducing Valve, Standard Capacity, Series: LFN45B-M1, 1/2 in Nominal Size, NPT Union Inlet x FNPT Outlet, 400 psi Working, 33 to 180 deg F, Media: Water, 4-9/16 in Top to Inlet Center, Cast Copper Silicon Alloy Body, Reinforced EPDM Diaphragm