What happens if a water hammer is left untreated?

Author: Prof. Clifton Labadie III  |  Last update: Monday, December 22, 2025

Left untreated, water hammer can lead to actual damage to pipework, appliances and components of any system.

What happens if you don't fix a water hammer?

The long-term effects of water hammer might present themselves in the following ways: Leaks: Water hammer has the potential to damage joints, fittings and connections, resulting in poor seals and ultimately leaky pipes. Ruptured pipes: Ruptured pipes due to built-up pressure can be particularly expensive to repair.

How urgent is a water hammer?

You may have heard it before and had no idea what the cause of the noise was. Water hammer isn't an emergency, but it is something to be concerned about in the sense that you want to have it addressed by a professional ASAP.

Can I ignore the water hammer?

Ignoring water hammer can ultimately result in the catastrophic failure of your flow system. The long-term effects of water hammer can include: Pump and Flow System Damage.

Can pipes burst from a water hammer?

Over time, water hammer can cause pipes not only to leak but burst. The bad news is that water hammer is a common problem.

How to Fix Banging Pipes / Water Hammer

Can a water hammer go away on its own?

Water hammer rarely goes away on its own; it's a serious plumbing problem you should address. Pipes can sustain damage from repeated impact, resulting in leaks or burst pipes. Fixtures like faucets and valves can also be affected by water hammer stress, leading to wear and tear or even failure over time.

When should I be worried about water hammer?

The noise produced is irritating and frustrating. However, that isn't the main issue. A water hammer is a surefire sign that damage may occur in your plumbing pipes. Therefore, you should enlist a plumber to inspect the plumbing system should you hear of any water hammer before permanent and costly damage arises.

How do you permanently fix a water hammer?

So let's get into 8 water hammer solutions and show you how to fix water hammer in your home.
  1. Are air pockets the problem? ...
  2. Close valves half-way. ...
  3. Replace intake connections. ...
  4. Install water hammer arrestors. ...
  5. Secure the pipe. ...
  6. Install pressure limiting valve. ...
  7. Install different taps. ...
  8. Call the plumber.

How much does it cost to fix a water hammer?

A water hammer arrestor costs from $15 to $50. They're available online, at home centers, and in hardware stores. Most of the cost of a water hammer arrestor installation is in the labor. Calling in a pro will typically run $250 – $500.

Why have I suddenly got a water hammer?

If you've never had water hammer and one day you suddenly experience it out of the blue, then it's likely your water system's air chambers are blocked. These chambers often become blocked with water or residue from minerals found in water.

Do I need a plumber for a water hammer?

Water pipes should be quiet, so what in the world can it be? Well, it is most likely you have a water hammer. In that case, you will need to contact a local plumber to fix it. Water hammer is also referred to as hydraulic shock.

What is the critical time of a water hammer?

Critical time (tc) of closure of a valve is equal to 2L/c, where L is the length of the pipe in the upstream of the valve up to the reservoir, and c is the velocity of sound in fluid.

How to get rid of air in water pipes?

Remove air from your pipes in five easy steps:
  1. Turn Off Your Main Water Supply Valve. ...
  2. Open all the faucets in your house. ...
  3. Wait for All Faucets to Run Dry and Flush Toilets. ...
  4. Turn the Main Water Supply Back On. ...
  5. Turn All Faucets Off Again in the Correct Order.

How do you fix a water hammer without a plumber?

There are a few different ways you can address water hammer yourself, even without much plumbing experience.
  1. Clear the Air Chambers.
  2. Install a Water Hammer Arrester.
  3. Adjust the Water Pressure.
  4. Install a Water Pressure Regulator.

How long will water hammer last?

Q: How long will the Sioux Chief engineered water hammer arresters last? A: Although arresters are typically tested to 10,000 cycles, Sioux Chief arresters have been independently lab tested to withstand 500,000 cycles without failure.

Is a water hammer an emergency?

Also called a hydraulic surge or a hydraulic shock, the water hammer effect usually happens when moving fluids are forced to change directions or are stopped abruptly. The term water hammer sounds alarming, but it' not a plumbing emergency. However, it could be an indication of the current condition of your pipes.

What happens if you ignore the water hammer?

The Risks of Ignoring Water Hammer

Over time, the repeated pressure surges can weaken joints and cause leaks, or in severe cases, even cause pipes to burst. This damage can be costly to repair and may lead to water damage in your home.

How do you neutralize water hammer?

To do this, shut off your home's main water valve, then open the highest faucet in your home. Next, turn on the lowest faucet in your home and keep it on until all water has drained. Finally, reopen the main water valve to refill your pipes.

How to stop water pipes banging at night?

The only solution is to drain the entire system to "recharge" the air chamber. A more practical and enduring solution is using water hammer arrestors.

Can water hammer disappear?

You can cure water hammer by turning off the water behind the waterlogged chamber, opening the offending faucet and permitting the faucet to drain thoroughly. Once all the water drains from the chamber, air will fill it again and restore the cushion.

Why does my faucet sound like a jackhammer when I turn it on?

In that case, the noise is caused by trapped air in the pipes; this is caused by an “air hammer.” In this case, there can be an air pocket that is highly compressed due to water pressure.

Why is water hammer getting worse?

shockwave up and down the pipe. The problem of banging pipes can be made worse if there's a build-up of limescale in the pipework, as the water has even less space in which to manoeuvre. That's more likely in hard water areas.

How does a plumber fix a water hammer?

Install a water hammer arrestor: This device has an air-filled cylinder to absorb the impact of abrupt increases in water pressure. Most water hammer arrestors are installed between the shut-off valve and supply line via screw-type connectors.

Can pipes burst from water hammer?

Water hammer is a serious problem that will cause erosion and damage to the pipes, valves, fittings and can cause pipe bursts.

How do you get air out of washing machine pipes?

To remove air from your pipes, open all the faucets in your home connected to your water mains, including your dishwasher and washing machine. You don't need to open the faucets completely. Opening them halfway is enough.

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