Water Hammer Arrestor, Body Material Copper with Low-Lead Brass Adapter, Connection Type MNPT, Pipe Size 3/4 in, Factory Set Pressure 60 psi, Overall Height 8 9/16 in, Diameter 1 3/8 in, Max. Pressure 150 psi, Temp. Range 33 Degrees to 180 Degrees F, Standards Ansi A112.26.1m, Asse 1010, IAPMO