Proflo 

Low Lead Water Hammer Arrestor 

Model: PFXWHACTCA 

Size: 3/8" OD Compression Tee X 3/8" OD Female

Product Specifications 
TemperatureRange:33˚F to 180˚F Max.
WorkingPressure:350 PSI ASSE 1010-2004 IAMPO 
Listed (cUPC) Certified to NSF 372 requirements