Lead Free Series LF150A Water Hammer Arresters are used in residential applications to control water pressure shock and prevent water hammer conditions. It consists of a pre-charged air chamber that is rechargeable, an air-tight sealing cap, standard tire valve connection for easy charging, stainless steel top, sealed-in diaphragm, lower stainless steel chamber, and brass hex adapter for easy installation. It can be installed in new or existing plumbing systems in any angle. Series LF150A is ideal for dishwashers, clothes washers, and quick-closing faucets. Model LF150A-HA water hammer Arrester with 3/4 in. (20mm) hose thread for washing machines and Model LF150-HA is just 3/4 in. (20mm) fitting. Maximum Working Pressure: 150psi (10.3 bar), Maximum Shock Pressure: 200psi (13.8 bar), Maximum Velocity: 10 F.P.S. WATTS® Water Hammer Arrester, Series: LF150, 1/2 in Nominal, NPT, 150 psi, 180 deg F, Domestic