Banish the Pipe-Banging Blues: Essential Tips for Replacing a Water Hammer Arrestor

Water hammer arrestors, also known as shock absorbers, play a crucial role in preventing the annoying thumping or banging noises in your plumbing system. These devices absorb excess water pressure, which occurs when water flow is suddenly stopped or changed. If your water hammer arrestor is faulty, it can lead to damaged pipes, leaks, and even burst fixtures. This detailed guide will provide step-by-step instructions on how to replace a water hammer arrestor effectively.

Identifying the Water Hammer Arrester:

Water hammer arrestors are typically located near the source of the banging noise, such as under sinks, near washing machines, or water heaters. They have a cylindrical or bell-shaped body with a brass or plastic cap on one end. The other end is connected to the water supply pipe.

Gather Your Tools:

Before starting the replacement process, gather the necessary tools:

• Adjustable wrench
• Pipe wrench
• Teflon tape
• Plumber’s putty (optional)
• New water hammer arrestor

Step-by-Step Replacement Guide:

1. Shut Off Water Supply:

Turn off the main water supply valve to prevent water from flowing while working.

2. Release Pressure:

Open the nearest faucet to release any remaining water pressure in the system.

3. Disconnect Old Arrester:

Using an adjustable wrench, loosen the nuts connecting the old water hammer arrestor to the water supply pipe. Gently remove the arrester.

4. Clean the Threads:

Wrap a few layers of Teflon tape around the threads of both the pipe and the new arrester. This will help create a watertight seal.

5. Install New Arrester:

Hand-tighten the new water hammer arrestor onto the water supply pipe. Use the adjustable wrench to further tighten it, but avoid overtightening.

6. Apply Plumber’s Putty (Optional):

If desired, apply a small amount of plumber’s putty around the base of the arrester where it meets the pipe. This will provide an additional seal.

7. Turn on Water Supply:

Slowly turn on the main water supply valve. Check for any leaks around the arrester. If there are leaks, tighten the nuts further.

Troubleshooting Tips:

• If the thumping noise persists after replacing the arrester, check for other potential causes, such as loose pipes or a faulty pressure regulator.
• If the new arrester leaks, it may be defective. Replace it with a new one.
• If you are unsure about any part of the replacement process, contact a licensed plumber for assistance.

Final Note:

Replacing a water hammer arrestor is a straightforward task that can effectively eliminate annoying banging noises in your plumbing system. By following these step-by-step instructions and using the recommended tools, you can restore peace and quiet to your home.

Frequently Asked Questions:

Q: How often should I replace my water hammer arrestor?
A: Water hammer arrestors typically last 5-10 years. However, factors such as water quality and usage can affect their lifespan.

Q: Can I use a different type of water hammer arrestor?
A: Yes, there are different types of water hammer arrestors available, including piston-type, diaphragm-type, and bladder-type. Choose the type that is most suitable for your plumbing system.

Q: Is it safe to replace a water hammer arrestor myself?
A: Yes, it is generally safe to replace a water hammer arrestor yourself, provided you have basic plumbing skills and follow the instructions carefully. However, if you are not confident, it is advisable to contact a qualified plumber.