Sioux Chief Mfg 660-H 3/4-Inch Female Swivel Hose Thread by 3/4-Inch Male Hose Thread Mini Rester Water hammer arrester tee Install on washing machine supply valves or directly to washing machine tub or shower tee 3/4-Inch female swivel hose thread connection 3/4-Inch male hose thread connection Systems which exceed 60 PSI (414kPa) static pressure shall be installed with a pressure reducing valve upstream of the arrester.