Caleffi Pressure Reducing Valve, Pre-Adjustable, Series: 535H, 1 in Nominal, FNPT, 180 deg F, 19 gpm, Media: Water, 7-1/16 in Inlet to Outlet Length, 4-1/2 in Top to Inlet Center, Forged Brass Body, Stainless Steel Trim, Peroxide-Cured EPDM Diaphragm/Seal
Pressure reducing valves are devices which, when installed on water systems, reduce and stabilize the pressure of the water entering from the water supply main. This pressure, in general, is too high and variable for domestic systems to operate correctly.