Water Hammer in Pipes in Cambridge, ON: Why Your Plumbing Is Making Banging Noises

March 12, 2026

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Water Hammer in Pipes in Cambridge, ON: Why Your Plumbing Is Making Banging Noises


If you hear loud banging, knocking, or thumping sounds in your walls after turning off a faucet, you may be experiencing a plumbing issue known as water hammer.

Many homeowners in Cambridge, ON first notice the problem when:

A washing machine shuts off

A dishwasher finishes filling

A faucet closes quickly

A toilet stops refilling

The noise can be alarming and sometimes feels like pipes are hitting the walls.

While occasional noise may seem harmless, water hammer can damage plumbing over time if it’s not addressed.

A copper water hammer arrestor installed on a horizontal copper pipe mounted to wooden wall studs.

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