As mentioned our pipes are humming since having a water meter fitted. The water board sent a man round. He couldn’t fix it. He said he’s not a proper plumber and they would need one to come out. So sorted that and just had the call that they would be here in 15 minutes, However it turns out it is exactly the same guy coming round. Hooray! This has only been going on for several weeks.
No need to post in here but I thought you would want to know.
When we run our hot water there’s a proper loud noise for about 10 seconds, then it stops (the noise, not the water) and everything seems fine. Air in the system? Don’t know. Hope this helps.
the water company put my water meter wrong. When I was getting my kitchen done (so was able to get a sense of what was going on with all the pipes in my flat) I realised that the meter does not measure any of the cold water going to my bathroom
so all my toilet flushing and teeth brushing is free basically