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Originally Posted by ngdawg
We stayed in his house for the Rochester get together. As soon as any faucet is shut off, and most noticeably, the shower, the whole house fills with a banging/humming sound that lasts about 5 seconds. This didn't happen last summer.
Wouldn't an expansion tank or something on the water heater be a better and easier idea? I ask because it might only be the hot water lines; using cold and flushing doesn't produce the noises it seemed.
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IMO that is most likely due to vibration of the valve plug, the faucet seal, on that particular spigot. If it's worn or loose, it will flutter and actually cause that rapid on/off cycling that causes the vibrations. The simplest and most direct and cheapest solution is to fix the faucet.
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Originally Posted by james t kirk
Toilets seldom produce the dreaded hammer because they close very slowly as the float moves up in the tank.
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Right, but I've seen plenty of toilets make loud noises just as they shut off the refill cycle when the float sticks or hangs up and doesn't move up and down smoothly; so the water level in the reservoir goes up but the float sticks, then it suddenly rises, shuts off the water, and bam!