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InsightHorizon Digest

What to do if your house water pipes are noisy?

Author

William Taylor

Updated on February 25, 2026

What to do if your house water pipes are noisy?

Turn off the water supply to your house at the main supply (or street level). Open your faucets to drain all of the water from your plumbing system. Turn the water back on. The incoming water will flush the air out of the pipes but not out of the vertical air chamber, where the air supply has been restored.

What do you do if your water pipes are rattling?

‘Modern’ homes have in place what’s called a water hammer arrester. These little devices are affixed directly onto your pipes and are about the size of softballs if round, or a banana if cylindrical. What they have is a small chamber divided in two by a rubber diaphragm. On one side is water and the other, air.

Why does my water pipe make a moaning noise?

Water pressure that is set too high can also cause moaning noises. Both problems are inexpensive and fairly simple to fix as long as you properly diagnose them. Check that your water pressure is set to no more than 80 psi, or pounds per square inch. Measure water pressure using a psi gauge with a hose adapter.

Why is my water pipe so loud when I turn it off?

When water is running and is then suddenly turned off, the rushing liquid has no place to go and slams against the shut-off valve. The loud, thudding sound that follows is known as a water hammer. Besides being alarming, water hammer can potentially damage joints and connections in the water pipe itself.

Turn off the water supply to your house at the main supply (or street level). Open your faucets to drain all of the water from your plumbing system. Turn the water back on. The incoming water will flush the air out of the pipes but not out of the vertical air chamber, where the air supply has been restored.

When does the knocking in my water pipes stop?

A clicking/knocking noise starts soon after a hot water tap is turned on Clicking/knocking noise doesn’t stop until several minutes after the hot water tap is off Poor construction of CPVC water lines.

Why does my water pipe rattle when I Turn on the water?

What they have is a small chamber divided in two by a rubber diaphragm. On one side is water and the other, air. When the water that’s charged with the energy gained from a suddenly closed valve hits the diaphragm, it dissipates by vibrating the rubber diaphragm back and forth.

Water pressure that is set too high can also cause moaning noises. Both problems are inexpensive and fairly simple to fix as long as you properly diagnose them. Check that your water pressure is set to no more than 80 psi, or pounds per square inch. Measure water pressure using a psi gauge with a hose adapter.