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Unveiled: can water hammer repair itself? the surprising truth

Rob is a seasoned home improvement writer with over 15 years of experience researching and recommending products for the home. Prior to starting Nurturing Homeaid, he wrote extensively for This Old House magazine and has been featured as a home expert on several TV and radio programs. An avid DIY-er,...

What To Know

  • Water hammer is a plumbing problem that occurs when water flow is suddenly stopped, creating a pressure surge that can damage pipes and fixtures.
  • In some cases, rerouting pipes may be necessary to eliminate bends or kinks that restrict water flow and cause water hammer.
  • The cost of water hammer repair varies depending on the severity of the issue and the extent of the repairs required.

Water hammer is a plumbing problem that occurs when water flow is suddenly stopped, creating a pressure surge that can damage pipes and fixtures. While it’s tempting to hope that water hammer will resolve itself, this is rarely the case. In most instances, it requires professional intervention to prevent further damage.

Causes of Water Hammer

Water hammer is caused by several factors, including:

  • Rapid closure of faucets or valves
  • Malfunctioning water-saving devices
  • Loose or worn-out pipe supports
  • Incorrectly sized pipes
  • Air pockets in the plumbing system

Signs of Water Hammer

The telltale signs of water hammer include:

  • Loud banging or knocking noises in pipes
  • Shaking or vibrating pipes
  • Leaking faucets or valves
  • Reduced water flow
  • Water hammer arrestors failing to function

Can Water Hammer Be Prevented?

While water hammer can be a frustrating issue, it can be prevented with proper plumbing practices:

1. Install Water Hammer Arrestors

Water hammer arrestors are devices that absorb the pressure surge caused by water hammer. They should be installed on all fixtures that are likely to experience sudden water flow changes, such as faucets, valves, and washing machines.

2. Use Soft-Closing Valves

Soft-closing valves gradually close over a longer period, reducing the pressure surge. They are ideal for faucets and appliances that experience frequent use.

3. Secure Loose Pipes

Loose or worn-out pipe supports can allow pipes to move, which can lead to water hammer. Ensure that all pipes are securely fastened to studs or joists.

4. Use the Correct Pipe Size

Pipes that are too small can create excessive water pressure, increasing the risk of water hammer. Use pipes that are properly sized for the water flow volume.

5. Eliminate Air Pockets

Air pockets in the plumbing system can trap water and cause water hammer. Bleed air from faucets and valves regularly to prevent air pockets from forming.

How to Fix Water Hammer

If water hammer persists despite preventative measures, professional repair may be necessary. Common solutions include:

1. Inspection and Repair

A plumber will inspect the plumbing system to identify the source of the water hammer. They may need to repair or replace damaged pipes, valves, or fixtures.

2. Water Hammer Arrestor Installation

If water hammer arrestors are not installed, the plumber will install them on appropriate fixtures.

3. Pipe Support Adjustment

Loose or worn-out pipe supports will be tightened or replaced to secure the pipes and reduce movement.

4. Pipe Rerouting

In some cases, rerouting pipes may be necessary to eliminate bends or kinks that restrict water flow and cause water hammer.

Wrapping Up

Water hammer is a plumbing issue that can cause significant damage. While it can be tempting to hope it will resolve itself, professional intervention is usually necessary to prevent further problems. By implementing preventative measures and seeking professional repair when needed, you can protect your plumbing system from the damaging effects of water hammer.

Frequently Asked Questions

Q: Can water hammer cause leaks?
A: Yes, water hammer can cause leaks by damaging pipes and fixtures.

Q: How much does it cost to fix water hammer?
A: The cost of water hammer repair varies depending on the severity of the issue and the extent of the repairs required.

Q: Can I fix water hammer myself?
A: While some simple preventative measures can be taken, it’s generally recommended to hire a licensed plumber for water hammer repair to ensure proper diagnosis and effective solutions.

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Rob Sanders

Rob is a seasoned home improvement writer with over 15 years of experience researching and recommending products for the home. Prior to starting Nurturing Homeaid, he wrote extensively for This Old House magazine and has been featured as a home expert on several TV and radio programs. An avid DIY-er, Rob takes pride in testing out the latest tools and gadgets to see how they can make home projects easier. When it comes to heating systems, he's evaluated over 50 different furnace and boiler models over the years. Rob founded Nurturing Homeaid with his business partner Jim in 2020 to provide homeowners with genuine product recommendations they can trust. In his free time, Rob enjoys remodeling old homes with his family and traveling to visit architectural landmarks across the country. He holds a bachelor's degree in Journalism from Syracuse University.
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