Water Hammer Arrestor, 1/2 In NPT, 150 psi Price For: Each Max. Pressure: 150 psi Temp. Range: 33 Degrees to 180 Degrees F Overall Height: 4-5/16" Body Material: Stainless Steel with Brass Adapter Item: Water Hammer Arrestor Factory Set Pressure: 25 to 35 psi Connection Type: MNPT Diameter: 4-13/32" Pipe Size: 1/2" Country of Origin (subject to change): United States