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How to stop Water Hammer.........

Water Hammer is a shock wave of high pressure water in pipes, caused by the sudden closing of a valve. The water does not compress, but crashes into the closed valve again and again, creating a loud hammering noise. The wave eventually dissipates within the piping system. Evidence of water hammer may be obvious in the noise caused by vibration of pipes but can be silent in some systems. The generated pressure can be very high and, in time, result in damage to piping.
 
You might hear water hammer when the clothes washer stops filling, the sprinkler system shuts off or shifts to another zone, when the dishwasher changes wash cycles, or when a faucet is turned off suddenly. It exerts very great instantaneous pressures that over time could potentially damage the system by weakening joints and valves causing leaks or even ruptures in the pipes
  

Water hammer arrestors, if installed correctly, will absorb the shock at the point of origin, resulting in the elimination of noise and potential damage to piping.
 
Several common causes of water hammer are:
  • Poor pipe installation
  • Mixing taps
  • Faulty tap washers
  • Solenoid valves on appliances
  • High pressure water (reducing water pressure can reduce water hammer)
 
The Watts Series 15 hammer arrestor incorporates a precharged, permanent sealed air chamber to absorb the shock. The sealed chamber prevents the loss of air to the water and insures long and trouble-free life.
 
 
Watts Water Hammer Arrestors are used in commercial and industrial applications to control water pressure shock and prevent water hammer conditions. It consists of a copper body, EPDM seals and O-rings, brass piston and cap, and threaded brass hex adapter. It can be installed in new or existing plumbing systems in concealed locations with a standard pipe tee in any angle. Applications include commercial dishwashers, clothes washers, and quick-closing taps. Maximum Working Pressure: 150psi (10.3 bar).
 
 

DateTuesday 12 Jun 2007