Shurflo Pressure Regulating Fresh Water Fill - Wall MountShurflo's 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.3/4" GSH Female swivel inlet. 1/2" NPSM - Male Outlet. Quick, Permanent Wall Mount; Continuous Protection from High Pressure Surges; Fits Standard Hose Fittings; Built-In Check Valve; 65 PSI; Colors Available:183-029-14 - Chrome183-029-18 - WhiteSpecifications: Overall Size: 4-5/8" Square; Screw Hole Pattern: 3-3/8" Square;