Aug 18, 2012, 05:50 AM
Just in the last week my pipes start knocking or banging after we flush the toilet and run the shower. It stops when we turn off the water, or when the toilet finishes filling. Sometimes its just a steady bang, bang, bang. Other times it sounds like the pipes are trying to crawl out from under the house and go on strike. It only make the noise as the water is running, and lasts the duration. It also makes that sound when the outside faucet is running. We are on a city water line and havent made any changes to the plumbing system. We have bought a new dishwasher and started using it last week. The noises have started after that and we only replaced the older dishwasher we already had. I read up on water hammer but it didnt seem like the answer quite fit the problem. We are a pretty good do-it-ourselves team, but plumbing problems might be out of our league.