microwheel

I was having the same issue with our suburban 6gal hot water tank in our keystone 5th wheel brand new as of 2019, from day one. Followed all the correct processes to re-establish the air pocket to no avail. Even changed the t&p valve. Our hot water tank did not have a backflow preventer on the cold water side of the hot water tank. I called suburban about the issue and they recommended I install a accumulater tank on the cold water side on the hot water tank, so I did,.and no more T&P relief valve dripping during heating cycle. If you contact suburban they will suggest this if you have tried the normal process to re-establish the air pocket and it doesn't work.