Finding and fixing the causes of water hammer, a shuddering, knocking or banging noise in water pipes.

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Why does my Rinnai Infinity water heater fire up after turning off the cold tap?

I have a Rinnai Infinity XR20. It's about 3 years old. I've just recently noticed a peculiar issue with it that I hadn't noticed before. If I turn on a cold tap like the one to the garden hose and ...
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What causes hammering from a new diverter when other faucets are quickly turned on and off?

We're doing a minor remodel of our master bathroom, and I have replaced the 30+ year old diverter and nearby pipe with a new one from Delta. Now when any faucet in the house is turned on and off ...
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Can I reduce or eliminate water hammer without plumbing?

I have a friend who lives in an apartment with terrible water hammer problems which the management is unwilling to fix. I'm curious if there is a product or device that would attach, for instance, to ...