Adjusting Water Pressure Lowering the pressure in the pipes is an easy way to reduce or eliminate water hammer. If one or both of the pipes supplying the washing machine has a shutoff valve, you may be able to curtail the banging by partially closing it.

How do I stop water hammer in my washing machine?

Install 2 arrestors, 1 on the cold water supply line and 1 on the hot. Installing arrestors on both supply lines will protect both pipes from damage from water hammer, even if you don’t hear them both banging. Whether using arrestors on washing machines or other taps, install them on both hot and cold taps.

How do I stop my water pipes from banging?

How to stop water hammer

  1. Is air pockets the problem? Another issue that can cause a similar banging sound is actually air pockets in your pipes. …
  2. Close valves half-way. …
  3. Replace intake connections. …
  4. Install water hammer arresters. …
  5. Secure the pipe. …
  6. Install pressure limiting valve. …
  7. Install different taps. …
  8. Call the plumber.


Do all washing machines cause water hammer?

Not all washing machines create water hammer, says Bernie Deitrick, a Consumer Reports engineer. But if your washer does shake the plumbing, first try an inline water hammer arrester with hose fittings.

How do you install a water hammer arrestor on a washing machine?

Quote from the video:
Quote from Youtube video: They can be positioned vertically or horizontally. And should be placed within six feet of the fixture or valve causing the noise.

What causes loud banging in water pipes?

Banging. Usually, banging noises in the pipes come from a problem with water pressure or water flow. Two of the most common causes are water hammers and trapped air bubbles. A water hammer occurs when a faucet or valve is shut off suddenly.

How do I stop water hammer in my house pipes?

Quote from the video:
Quote from Youtube video: Water hammer effect if you have water hammer there's something simple you can try turn off the main water valve for your home. And open all of the faucets. Throughout your house to drain the lines.

Where is the best place to install water hammer arrestor?

The best places are either close to the pump, isolation or check valve that is originating the hammer, or at more distant points where the pipe changes direction, for example at the top of a pump riser.

Do washing machines need hammer arrestors?

Yes, a properly sized water hammer arrester placed on the cold and hot water supplies to the washing machine will absorb the shock as caused by quick closure devices.

Can a water hammer arrestor be installed anywhere?

“Water hammer arresters shall be specifically sized and have sufficient volume of air to dissipate the calculated kinetic energy generated by closing residential or commercial faucets or valves. Arresters shall be installed on both hot and cold lines on the supply stops where applicable.