This has been going of for about a year, on and off. No, it's not "water hammer". This is a loud, "groaning" sound that shakes the room. The sound can lasts from 2 to 3 seconds.
Sometimes it comes from the garage, where the water heater is. I'm in the garage sometimes when it happens. It's v-e-r-y loud, yet sometimes it's a quiet groan.
When we turn on a tap---it stops. The noise comes from the opposite side of the house sometimes. It happens at night when we are trying to sleep and it happens at all hours day and night
Our water bill has gone up almost 100% since this has occurred. Can there be a leak under the slab or somewhere?
It's driving us crazy, I don't know what to think or what to do:eek:
Can anyone please help us?
Thank you very much for taking the time to respond!
Norm and Loretta...San Diego [we're retired...have mercy!]