• Dutco Tennant LLC, PO Box 233, Dubai, U.A.E.

The term Water hammer describes the loud banging noises in the pipes which are caused when the water has built up momentum flowing via the pipes is stopped suddenly with a valve that closes rapidly. When water hits a sudden wall, without getting compressed it gets lashed back in a wave. A severe pressure spike is caused by this. Due to these hydraulic pressure spikes, the pipes can get loose and the fittings can be damaged due to water hammer. This can be reduced with Plumbing Water Hammer Arrestors.

Water hammer is the pressure caused when a fluid in motion is suddenly stopped or is made to change its direction. It is also known as hydraulic shock. A water hammer usually occurs when a valve closes at the end of a pipeline system. This pressure can cause a lot of serious problems, such as an explosion or collapse of the pipe, and appendages due to loud sound, and vibration.

Plumbing Water hammer is the pressure caused when a fluid in motion is suddenly stopped or is made to change its direction. It is also known as hydraulic shock. Mainly when a valve closes at the end of a pipeline system, a water hammer can happen. A lot of serious problems can occur due to this like collapse or explosion of the pipes along with adjunct due to vibration and loud sound. In domestic plumbing like washing machines, dishwashers, and toilets, water hammers can be experienced.

Plumbing Water Hammer Arrestors are selected for absorbing the shock when the water which is flowing inside a piping system stops suddenly because of the quick closing of the shutoff valves, clothes, washers and dishwashers. This can protect them from annoying and potential damage effects of the water hammer. These Arrestors can maintain the health of the piping. The older systems can cause hydraulic shocks or water hammers very frequently which can result in unwanted noise. This annoying sound is not just disturbing but the intense pressure can again create severe problems like sonorous noise, collapsing of the pipe, damage to the valves and even flooding. For ensuring that the constant vibration and hammering do not create any severe destruction to the system, the best solution lies with installing water hammer arrestors.

Water hammer can be experienced in domestic plumbing in dishwashers, washing machines, and toilets. It can also happen in hydroelectric generating stations. It can be heard as a loud banging, repetitive banging, or as some shuddering. While flowing very fast via the pipes, the water develops momentum. Whenever any valve gets quickly closed and the flow gets stopped, this momentum can shake and the pipe can get pounded. This condition can be cured with a plumbing water hammer arrestor with an air cushion that can absorb the momentum. Before installing any plumbing water hammer arrestor, ensure to find out which particular pieces of valves and faucets in your house can cause the noise. The main suspects can be dishwashers and washing machines as their automatic valves get closed fast. Washing Machines have water hammer arrestors with screw-on connections which makes them easy to attach as a garden hose.

The effect of plumbing water hammers can be significantly reduced with the help of plumbing water hammer arrestors. Plumbing Water hammer arrestors are hydro-pneumatic devices similar in principle to a shock absorber. When installed between the water pipe and the machine, it absorbs the shock reduces pressure in the piping system to safe levels.

The fast closing of the positive shutoff valves that are connected in the systems of Clothes washers, Dishwashers can all contribute to creating water shock which is annoying and can also damage the pipes and appliances. Plumbing Water Hammer Arrestors incorporate a permanent pre-charged sealed air chamber for absorbing the shock. The loss of air to the water is prevented by the sealed chamber prevents which ensures long uninterrupted life. All potential leak points are permanently sealed.

In all the water supply systems of buildings in which the quick-acting valves are installed, are needed to be offered with devices for absorbing the hammer that is caused by the high pressures that result from the quick closing of these valves. These pressure absorbing devices which are the plumbing water hammer arrestors shall be approved mechanical devices and the water pressure absorbing devices shall be installed as close as possible to quick-acting valves.


  • Lead-free
  • Precharged, permanently sealed air chamber to absorb the shock
  • Approved for installation with no access panel required
  • May be installed in new or existing plumbing systems with a standard pipe tee
  • Factory air charged and permanently sealed
  • Design standard PDI WH-201
Piston Type-Lead Free Copper Alloy

Piston Type-Lead Free Copper Alloy

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Diaphragm Type-Stainless Steel Arrestor

Diaphragm Type-Stainless Steel Arrestor