1/2″ Sweat Water hammer arrestor. It can be installed in any direction on both hot and cold lines. it has a working temperature range of 33 F to 180 F, a max working pressure of 250 PSI, and a burst pressure of 2900 PSI.
The sliding piston absorbs sudden pressure changes and keeps the pipes from banging. When a valve closes quickly and stops the flow, that momentum shakes and pounds pipes. A water hammer arrestor cures this condition with a cushion of air that absorbs the momentum.
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