After and during some heavy rainfall our kitchen tap will make an intermittent gurgling sound. It lasts for anything between 1 and 4 seconds then stops for about 3 to 5 minutes then happens again. In case it’s relevant this is the type of trap we have under the kitchen sink:
There is also a flexible pipe bringing the dishwasher waste water into this, although the angle of the photo hides it - I don’t think it’s relevant though, as the dishwasher wasn’t running at the time of the noise.
The only explanation I can think of is that as our sewer fills up with rainwater it changes the amount of airspace in the drainage system and that causes pressure changes which affect the trap??? Not a very convincing explanation but it’s all I’ve got.
Any ideas?
It’s not bad enough or frequent enough to really bother me enough to do anything about it, other than to want to know why it’s happening.