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8 ways To Stop Water Hammer

water hammer

Water hammer is a common plumbing problem that can be caused by several factors. In this blog post, we will discuss eight ways to stop water hammer and prevent it from happening again.

Keep in mind that some of these methods may not work for everyone, so it’s important to try them all until you find the solution that works best for you. Let’s get started!

What is a water hammer?

A type of hydraulic shock wave that forms when water suddenly changes direction is called a water hammer.

The noise is caused by a sudden change in water pressure, which causes the water to slam against the sides of the pipe. Water hammers can be damaging to both plumbing and electrical systems, and they can also be disruptive to the people who live in a home or work in a building.

Water hammers can occur when a valve is closed too quickly, or when a pipe is filled with air and then released.

In most cases, water hammers are harmless and will stop on their own after a few seconds. However, if the banging noise continues for an extended period of time, it can damage the pipes and cause leaks.

As a result, it is important to be aware of the potential for water hammers and take steps to prevent them from occurring.

What are the causes of a water hammer?

A water hammer is a condition that can occur in piping systems when there is a sudden change in the flow of water.

The most common cause of a water hammer is the closing of a valve too quickly, which creates a shock wave that travels through the piping.

Other causes include loose fittings, broken pipes, and pump failure. A water hammer can cause serious damage to piping, including bursting pipes and cracking fittings.

In some cases, it can even lead to structural damage to the building. It is important to address a water hammer as soon as possible to avoid costly repairs.

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8 simple ways to stop water hammer

Water hammer is a common plumbing problem that occurs when water flowing through pipes is suddenly forced to change direction or stop.

This can happen when a valve is closed too quickly or when washing machines change cycles. Water hammer can cause loud banging noises and damage to your pipes.

While air chamber and other methods can help reduce water hammers, the best way to eliminate them is to install a water hammer arrestor.

Fortunately, there are a few simple ways to stop water hammers. Some of them are:

Install air chambers

Air chambers installed at the end of a water line, and are near the shut-off valve. When water is forced to stop suddenly, the air in the chamber absorbs the shock and prevents it from traveling back through the pipes.

Install water hammer arrestors

If a water hammer is a problem in your home, you can install water hammer arresters on the main water supply line. This will help to absorb the shock of sudden water pressure changes and reduce noise.

Fix leaky faucets

A leaky faucet can cause a water hammer because it allows water to enter the pipes at a higher rate than they can handle.

Insulate the pipes

Pipe insulation helps to reduce noise and prevent heat loss, but it can also help to reduce water hammer. By insulating the pipes, you will help to absorb the shock of the pressure wave. You can either install the loose pipe straps or the galvanized or steel straps.

Check for blockages

Blocked pipes can cause water hammers because they restrict the flow of water through the system.

Check your washing machine hoses

Washing machines can cause water hammers when the hoses that supply them with water are old or damaged.

Replace old plumbing fixtures

Old plumbing fixtures are more likely to fail and cause water hammer.

Install a pressure limiting valve

If the water pressure is the cause of your water hammer, you can install a pressure limiting valve to reduce the pressure in the system. This will help to prevent water hammer from occurring.

If you have any other questions or concerns about water hammer, please feel free to contact a licensed plumber.

Can you make your own water hammer arrestor?

Yes, you can make your own water hammer arrestor by following these steps:

  1. Cut a piece of PVC pipe to the desired length. The length will depend on the size of the plumbing system in which it will be installed.
  2. Drill a hole in one end of the PVC pipe for the water inlet.
  3. Install a threaded fitting in the hole for the water inlet.
  4. Drill a hole in the other end of the PVC pipe for the water outlet.
  5. Install a threaded fitting in the hole for the water outlet.
  6. Install a check valve in the PVC pipe between the two fittings. The check valve will allow water to flow in only one direction and will prevent backflow into the system.
  7. Install a bleed valve on the PVC pipe. The bleed valve will allow air to be bled from the system and will help to prevent water hammer.
  8. Install the PVC pipe in the plumbing system so that it is located between the water supply and the point of use. Make sure that the fittings are tight and leak-free.
  9. Open the bleed valve and allow air to escape from the system until water begins to flow from the valve.
  10. Close the bleed valve and check for leaks. If there are no leaks, the water hammer arrestor is ready for use.

Does installing air pockets help in reducing water hammer?

Installing air pockets in your drain line can help to reduce water hammer by providing a cushion of air that absorbs some of the shock from the moving water.

This can be especially helpful if you live in an area with hard water, as the air pockets can also help to reduce mineral buildup in your pipes.

Air chambers are another way to help fix water hammer in your home. By installing air pockets, you can help drain water from the cold water supply line, which can help prevent the formation of ice and improve the flow of water through your pipes.

If you’re not sure how to install air pockets, or if your drain line is too small for them, you can always consult a plumber.


Water hammer can cause serious damage to your plumbing, costing you time and money. Fortunately, there are several ways to stop water hammer before it causes any problems. Follow these tips to protect your home from this noisy and potentially destructive problem.

Checkout our next blog on Toilet Installation.


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