Black water tank scrubber leaks water inside trailer

elkrott wrote:
Thanks for the information will see if I can get to the valve through shower controls.

In the Monaco McKenzie I used to live in, the vacuum breaker was in the wall next to the shower. On the other side of the wall from the shower was a picture or mirror (I don't remember which). Behind that thing were the shower water lines and the vacuum breaker for the black tank flush. The leak was a loose fitting. Tightened all the fittings in there, and no more problem.