I don't understand, it's roughly the same work as replacing the T&P valve. Most dripping T&P valves are not even bad, they just cannot fully shut because of scale invasion, could be closed by simply descaling with citric acid.I looked at a neighbours HWT she said was making noises. Her husband had gotten tired of the water coming out of PRV pipe onto the floor.
He installed a shark bite cap on the end of the pipe then left for a week working out of town.
The hot tap water was steaming.
How to explain to a women her husband had created a bomb and left for a week without getting him divorced or worse. Lol.
Not including this one, which might have a failed controller or temperature sensor.
I have renewed quite a few old water heaters the owners said "probably need replacement" by flushing and descaling. "wow as good as new"!