Series 05 Mini Water Hammer Arrestors are used in light commercial and residential applications to control water pressure shock and prevent water hammer conditions. Series 05 is factory air charged and is not rechargeable. It can be installed in new or existing plumbing systems in concealed locations with a standard pipe tee in any angle. Series 05 is ideal for dishwashers, clothes washers, and quick-closing faucets. Maximum Working Pressure: 150psi (10.3 bar)Connection: 3/8" NPT