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Water Hammer

Water hammer is a term given to a specific plumbing noise sounded when water flow in high velocity is suddenly stopped and as a result a shock wave is generated through the pipe line. Resembling a hammering sound, water hammers most commonly occur when a washing machine, dishwasher or toilet shuts off water flow. This great force of fast moving water can damage pipes and fittings that lack air cushions or chambers to absorb the generated shock wave and eliminate the hammering sound. Overtime high pressure water can absorb the air and fill the chamber. Waterlogged chambers cannot absorb generated shock waves unless water is drained out and air refills chamber. Air cushions will not be able to drain properly if they are clogged with scale or residue from chemicals or minerals in water. Air cushions larger than supply lines will prevent any clogging of this sort.

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