Originally Posted by Cummins12V98
Seems odd to have insulation on top of the tank. I would want the heat from the basement to keep the tank from freezing?
What are the two brass male pipes for?
I don't know if you got the answer or not, but those fittings are for the spray function of the black and grey tanks. That side of the RV is the door side since the uplift of the frame for the overhang is to the right in the image.