Water Hammer

Banging of pipes caused by the shock of closing valves - eg taps.

Occurs in a closed piping system as a result of the pressure being rapidly increased when the liquid velocity is suddenly increased.

This damaging effect is usually the result of sudden starting, stopping, change in pump speed, or the sudden opening or closing of a valve. Water hammer can usually be controlled by regulating the valve closure time, surge chambers, relief valves or other means.

See also: Water.

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Subjects: Civil Engineering