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 11 5/32 in Diameter 2 5/8 in Max Pressure 150 psi Temp Range 33 Degrees to 180 Degrees F Standards ASSE1010 ANSI A112.26.1M PDI WH201