clock menu more-arrow no yes mobile

How to Quiet Pipes With a Water Hammer Arrestor

Silencing noisy pipes with This Old House plumbing and heating expert Richard Trethewey

In this video, This Old House plumbing and heating expert Richard Trethewey silences noisy pipes.


1. Unscrew and remove the access panel to expose the plumbing connections to the tub.

2. Turn off the water leading to the bathroom, and open a couple of faucets on the lower level to drain the pipes of water.

3. Buff clean the hot- and cold-water supply pipes with a strip of emery cloth.

4. Hold a T-fitting against each supply pipe and marking them for cutting.

5. Use a tubing cutter to cut out a section from both the hot- and cold-water supply pipes. 6. Brush flux onto the fittings and pipe ends.

7. Slip the T-fittings onto the pipes and solder them in place using a propane torch and lead-free solder.

8. Wrap Teflon tape around threaded portion of each water hammer arrestor, then thread arrestors into T-fittings.

9. Tighten the arrestors with an adjustable wrench.

10. Secure loose water pipe to wall framing with a plastic clip and 1⅝-in. screw.

11. Reinstall the access panel and turn the water back on.

12. Test your work by opening the bathroom faucet all the way and then quickly shutting it off.