How to Get Rid of Water Hammering: Causes, Problems & Solutions

Water hammering is a common plumbing problem that can cause much damage if left untreated. In this blog post, we will discuss the causes of water hammering, the problems it can cause, and how to solve these issues. We will also provide tips on preventing water hammering from happening in the first place. So, if you have water hammering problems in your home or business, read this blog post.

What is a water hammer?

A water hammer is a transient hydraulic shock in a piping system when fluid flow is suddenly halted or slowed. When this happens, a “wave” of high-pressure water travels back through the piping system, causing a knocking or banging noise. Take steps to prevent water hammers from damaging pipes and other components in your system.

What causes water hammer?

A water hammer is a pressure surge that can cause damage to plumbing systems. It is usually caused by a valve’s sudden opening or closing, creating a shock wave that travels through the water pipes. This pressure surge can knock fixtures loose, burst pipes, and cause other damage.

How can I fix the water hammer?

If you are experiencing water hammering in your home or business, there are a few things you can do to fix the problem. First, you should check all of the valves in your system and make sure they are not loose.

Second, you can install a water hammer arrestor, a device that absorbs the shock from water pressure surges. Finally, you can increase the volume of your piping system by adding more pipes or increasing the diameter of the existing pipes.

How can I prevent water hammer?

You can do a few things to prevent water hammer from happening in the first place:

  1. Keep all valves in your piping system and keep them tight.
  2. Avoid sudden changes in water pressure by slowly opening and closing valves.
  3. You can install a water hammer arrestor to absorb the shock from pressure surges.

Is there an alternative to water hammer arresters?

If you are looking for an alternative to water hammer arresters, you can try installing a pressure-reducing valve. This type of valve regulates the water pressure in your piping system and can help to prevent water hammering. You can also try installing a check valve, which allows water to flow in one direction only. This can help to prevent backflow, which can cause water hammering.

How to stop the water hammer from the washing machine?

You might need to install a water hammer arrestor.

A water hammer arrestor is installed in the water line between the shut-off valve and the faucet, washing machine, or other plumbing fixture. When water is turned off quickly, it absorbs shock waves, which prevent damage to the pipe.

If you don’t want to or can’t install a water hammer arrestor, there are a few things you can do to try to prevent water hammer from happening:

– Install a soft-close valve on your shut-off valve. This will slow down the water flow when turned off, which will help reduce the shockwaves.

– Turn the water off slowly when you’re finished using it. This will give the water time to drain from the pipes before they are empty, which can help reduce the chances of water hammering.

– Check your washing machine’s hoses for leaks. A leaky hose can cause water to build up in the pipes, leading to a water hammer.

Where to install a water hammer arrestor?

Most water hammer arrestors are installed near the main shut-off valve for your home’s water supply. This way, if there is ever a sudden water pressure surge, the arrestor can mitigate it and protect your pipes from extensive damage.

You could also install it at each plumbing fixture or near where your home’s water supply enters the house. However, installation near the main shut-off valve is generally considered the most effective.

Why does the water hammer keep coming back?

There are a few reasons your water hammer might return, even after you think you’ve fixed the problem. One possibility is that an underlying issue with your home’s plumbing is causing the water hammer. This could be something as simple as a loose pipe or fixture or a more serious issue like inadequate piping.

The valves in your home’s plumbing may be misaligned, causing water pressure to build up and then suddenly release, causing water hammer. Finally, if you have an aging home, the pipes themselves may be simply worn out and need to be replaced.

How can the effects of water hammer be reduced?

There are a few ways to reduce the effects of water hammer. One is to slow down the opening or closing of the valve. This prevents the sudden jarring effect that can cause pipes to shake and eventually fail. Another way is to install a shock absorber in the piping system.

This absorbs some of the energy from the water so that it doesn’t build up and cause problems. Lastly, you can increase the overall size of the piping system to allow for expansion and contraction without causing damage.

If you have specific concerns, it’s best to consult a qualified plumbing professional for tailored advice.

Can water hammer burst pipes?

A water hammer can cause pipes to burst if the pressure gets too high. This usually happens when there is a sudden change in water pressure, such as when a valve is turned off too quickly. When this happens, the water in the pipes doesn’t have time to slow down, slamming into the closed valve and causing a sudden increase in pressure.

Will a pressure regulator stop the water hammer?

If you have a pressure regulator installed on your water line, it will help prevent water hammer. When water pressure is too high, pipes vibrate and knock against your home’s structure, causing a loud banging noise known as a water hammer. 

A pressure regulator is a valve that reduces the amount of water flow by restricting the amount of water pressure that comes through the pipe. This can help to stabilize the water pressure and eliminate those jarring thumps caused by the water hammer. Talk to your local plumber or hardware store about installing a pressure regulator if you have high water pressure.

Frequently Asked Questions:

What happens if a water hammer arrestor doesn’t work?

If a water hammer arrestor doesn’t work, it could be due to a few different things. One possibility is that the arrestor is too small for the amount of water flowing through your pipes. Another possibility is an underlying issue with your plumbing that is causing the water pressure to fluctuate.

How much does it cost to fix a water hammer?

The cost to fix a water hammer will vary depending on the cause and severity of the problem. Sometimes, it may be as simple as adjusting a valve or installing a water hammer arrestor, which can be done for around $250-$300.

Can a toilet valve cause a water hammer?

A toilet valve can cause a water hammer if it is not properly installed or adjusted. When the valve is turned off too quickly, it can cause a sudden change in water pressure, leading to the pipes banging and vibrating.

How do I know if my house has a water hammer?

You may have a water hammer if you hear banging or knocking noises from your walls or pipes. Another sign of a water hammer is if your faucets or fixtures shake when you turn them on or off. If you think you might have a problem with the water hammer, talk to your local plumber for an inspection.

How do you find the source of the water hammer?

The source of the water hammer can usually be found by following the noise. Start by turning off all the appliances and fixtures in your home, then go from room to room until you find where the noise is coming from. Once you’ve located the source, you can start to troubleshoot the problem.


Sometimes, water hammering can signify clogged pipes or broken faucets. If you notice that the pounding sound has become unbearable and if there are signs of water leakage, it’s better to call a plumber for prompt assistance. You can also try home solutions, such as installing new pipes, replacing your faucets, and clearing out any accumulated debris in drains to fix the issue. After all these measures have been taken care of, you just have to ensure they don’t happen again.


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