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,...
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Look underneath, if possible, to see the number of tanks. The displays are usually generic and used across model lines so you don't necessarily have the number of tanks as displayed. My tt monitor shows 1 black and 2 grey even though I only have one of each.
