Knocking noise in pipes

[Lisa Collins]

We have a General Electric Potscrubber 900 that came with our house- we don't have manuals. A few months ago we installed a new water heater. Since then, each time I use the dishwasher at some point in the cycles the water knocks all the pipes in the house for several minutes. Any ideas what would cause this??

 

[oilman]

It sounds like water hammer, and rather than the cause, the cure is to have a small expansion chamber tee-d onto the washer supply pipe. This will reduce or stop the knocking.

PS why is it almost all the washer queries come from the USA? Are their washers unreliable?

 

[Lisa Collins]

Thanks for tip! I'll see what that does for us and we'll let you know.

P.s. Don't know what to say about the washers and the U.S.