Water Hammer Arrestor Body Material Copper with Low-Lead Brass Adapter Connection Type MNPT Pipe Size 1 in Factory Set Pressure 60 psi Overall Height 12 11/16 in Diameter 2 1/8 in Max Pressure 150 psi Temp Range 33 Degrees to 180 Degrees F Standards Ansi A112.26.1m Asse 1010 IAPMO