I have a new trailer that is lacking in outlets. I discovered in a access cabinet this junction box which seems to be where the 30amp cord comes into the trailer before it gets to the converter. Th...
They can do dual duty. My bathroom sink drain ties into the black tank vent pipe a few inches above the black tank. My kitchen sink drain and my shower drain, both, tie into my gray tank vent a few inches above the tank. As a matter of fact, that is the only opening in my gray tank except the drain line going to the dump station.