What causes noisy pipes?

Why Are My Pipes Making Noise?

Noisy pipes can be annoying and may indicate underlying plumbing issues. Different sounds point to different problems:

• ✔ Banging or hammering: Usually water hammer, caused by the sudden stopping of water flow, often when a valve closes quickly.
• ✔ Whistling: Typically indicates water moving through a restricted area, like a partially closed valve or mineral buildup.
• ✔ Rattling: Pipes may not be properly secured and are moving when water flows through them.
• ✔ Ticking or tapping: Often caused by thermal expansion as hot water pipes heat up and cool down.
• ✔ Humming: Usually related to water pressure that's too high, especially common with washing machine valves.
• ✔ Gurgling: Often indicates drain venting issues, allowing air to bubble back through the water.

For water hammer (banging), installing water hammer arrestors can solve the problem. For loose pipes, adding additional pipe straps or cushioned clamps can prevent movement. High-pressure issues may require a pressure regulator. While some pipe noises are merely annoying, others can signal problems that could lead to leaks or pipe damage if not addressed.