I’m getting a loud humming or groaning noise for 15-20 seconds after flushing a toilet on the ground floor of our house. The noise starts right after the toilet finishes refilling. It mainly happens on one toilet but sometimes on another. It’s not a banging noise. More like a strong vibration. It does not happen when we flush the third downstairs toilet.
Is this water hammer? How do we fix it?
Is this water hammer? How do we fix it?