problem occurs when the dish washer is running. if we turn the hot water supply to the washmachine off, the pipes do not rattle anymore. the washmachine is in the basement and the dishwasher is upstairs. as long as the hot water valve is off, the pipes do not rattle. when we wash cloths, we have to turn on the hot water supply to the washer.
we just moved into this house 2 monthe ago and thought it would go away. no luck.