We notice our pipes make banging sounds whenever we flush the upstairs toilet and run water. Now since we are still resolving our 60 day walk thru - (though it's almost time for the 11 month) we asked if this was something that would be fixed during our 11 month. We were told by VM that it was Pipes expanding when hot water goes through it. This sounds like bs to me. Just want to know if someone else has had baning pipes - or dealt with same problem.