I don't know my next door neighbour well.
Recently her pipes - I think! - have started making a racket. It lasts for 10-20 seconds a time and it's like a foghorn. Don't mind it in evenings etc but I had a chance at a lie in this morning and they woke me up. I think there might be air in their system.
WIBU to knock their door/leave a note and ask them to sort it? No idea of their financial situation etc (should I ask to contribute?) but it's getting worse as - presumably - they have the heating on a bit more.
It's been going on for about 6-8 weeks getting worse as times goes on. They surely must be aware of it as I can hear it in my house and I've not said anything to see if they sort it first.
WIBU to say something or would it seem petty?