How do you switch between holding tanks.
This might be a dumb question. I just purchased a new trailer and I noticed on the display panel it has two black tanks and two grey tanks. The exterior only has one drain location, with two pulls,...
Forum Discussion
It really doesn't matter what the display panel indicates (besides trying to solve the owner's bewilderment). The tanks are drained through the two exterior connections and no inter-tank connections would have to be dealt with if there are no separate valves for them.
One clue as to tank numbers may be the number of vents coming through the roof. Typically, there will be one vent per tank.
One clue as to tank numbers may be the number of vents coming through the roof. Typically, there will be one vent per tank.
