Water hammer is a dangerous hydraulic shockwave caused when fast-moving water in pipes is suddenly stopped, often by quickly closing a valve. This sudden momentum change generates a spike in pressure ...

Water hammer can be prevented by installing a water hammer arrestor (about $15). It acts like a shock absorber by allowing the shock wave to dissipate in its air chamber.

WHEN the water-hammer surges that accompany rapid velocity changes in pipes are of such a kind as to produce a fall to vapour pressure, cavities are formed. Theory and analysis at present ...

WSSC Water officially lifted its boil water advisory on Wednesday for customers in Prince George’s County, ... known as a “water hammer” that can occur when water flow and pressure changes.