This knocking pipe problem is really strange. It is a weak knocking sound 2 or 3 times per second normally happened at night time in about half an hour after all water usage is stopped. Once it started, it will keep knocking till the next morning. It really drives me crazy. The only way I found that can stop it temporarily is using water like flushing the toilet. It will stop the knocking about another half an hour. So imaging that, wake up by the noise at 1:00AM, flush the toilet, try to get back to sleep before 1:30AM, if not, flush again... Anyone can give some advice?
- posted
16 years ago