NEW 3/8″ Ball Valve for Pressure Washers Max 4500 PSI 3/8″ fitting Female Out by | Jul 24, 2026Quick Disconnect Fitting: 3/8″ quick coupler plug + 3/8″ male NPT thread; 3/8″ quick coupler socket + 3/8″ male NPT thread. Warranty: One Year Warranty. The steel pressure washing ball valve kit is designed for pressure washer hose.