My pipes are making an awful howling / whining noise some of the time (lately more often than not). Why?
I've researched this on the internet and the reasons seem to be:
- bad ballcock valve in one of the toilets
- bad valve in one of the sinks
- air in the pipes
- excessively high water pressure from the street
It's a three level townhouse.
I tried tricks recommended like:
- turning off every valve in the house and trying different sinks
- draining the system by leaving faucets on, turning off the main, and waiting for everything to stop, then turning it back on
Turning every valve off made absolutely no difference.
For the draining/flushing, I tried different strategies, thinking it was air in the pipes, so I tried keeping top and bottom floor valves open when turning the main back on (all cosed, then both top/bottom at once, then just bottom and just top). I also tried keeping the outside bib open.
Immediately after draining it was worse, but then a couple of hours later it was better. It went from all the time to only some of the time.
It was going just in the evening/morning, but now it's not predictable. It's a loud howling/whining sound. There's no banging or shuddering (except when refilling the drained system). It happens with every water outlet as long as the water is running (washing machine, dishwasher, toilets, etc).
Also probably very related, before the whining started the toilet on the top floor started "burping". Usually 3-4 quick *pchews* and a 1s water fill. Now when it does that the whining happens for a second or two per burp, but it was doing it for a couple of weeks before the whining started.
There's a chance the neighbors are experiencing the same thing, as sometimes I think I hear the same sound but from either side.