A few months ago, I shut the water off in my 10 yr old home to install flexible tubing to a toilet water tank। After installing the tubing and turning the water on again, I started to receive the most obnoxious water hammer when a particular hot water faucet is turned on. It sounds like someone is literally trying to kick a door in. This does not occur when the water is turned off. This does not occur with the cold water tap; only the hot water tap in the first floor bathroom. It does not occur if I turn on the cold and hot water taps simultaneously. It only happens if I turn on the hot water tap by itself. And its getting progressively worse. I have been told that I can do something along the lines of shutting down the water again, then slowly, gradually turn the water back on to eliminate air in the pipes. That struck me as strange because it would appear to me that trapped air would long since have found its way out by now. I do not want to create a situation where I have mutilple pipes hammering so I am seeking advice on what my next steps should be. Please advise.
You might want to replace the washer in that faucet। a loose washer will sound like a jack hammer when it starts banging. good luck