SHURFLO Pressure Reducing City Water Entry Wall Mount, Gel White (183-020-18) FO-1759 EXCLUSIVE diaphragm design prevents high-pressure damage often caused by city water systems THESE high performance water entries limit water pressure and include a check valve PORTS 3/4" GHT - Female Swivel Inlet, 1/2" NPSM - Male Outlet QUICK Permanent Wall Mount, Continuous Protection from High Pressure Surges and Fits Standard Hose Fittings PRESSURE of 65 PSI. Built-In Check Valve