Stop plumbing rattling

When my dishwasher is turned on, the house plumbing in the vicinity rattles violently.

Turning on the nearby kitchen faucet attenuates the rattling slightly. The dishwasher is hooked up to the HOT water supply.

This does not occur anywhere else except in a bathroom where the COLD water faucet caused some juddering when opened fully.

Does anyone know how I could sole this or a good company to call in, unfortunately I did not take out plumbing insurance

3 Responses to “Stop plumbing rattling”

Sydnee Millington Said:

What you’ve got is called “water hammer”; the pipes shorten when pressure drops and lengthen when it surges, and the fast variations in pressure caused by valves opening and closing can cause it to rattle against the studs and whatnot. (Hammer usually occurs on valves closing, because the pressures caused by a long column of water suddenly hitting a closed valve are much greater than the supply pressure.)

There are two things you can do:

1. Install “hammer stops”; these are gas-filled chambers which absorb pressure surges. You want these right at the end of the pipe.
2. If you can get to the pipes, install foam rubber to absorb the impact of the pipes hitting the wall. If you can insulate your hot-water pipes at the same time, so much the better.
Desirae Devonshire Said:

I can’t remember the specific name. Basically it’s like a vertical pipe that goes up from the water line and is capped off. It will remain full of air and acts like a shock absorber as the air compresses and retracts as the water turns on and off.
Mollie117 Said:

what you haveis called “water hammer”it occurs when air is trapped in pipe.
there are devices to put into pipe system to alliviate the problem. it is like a 6″
piece which tee’s into the pipe. there is a spring inside like a little shock absorber.
If your handy go to plumbing supply, shouldn’t be to hard to install.

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