Originally Posted by MotocrossCamper
Grey tank should be the one more toward the rear. If your on the side looking at them that would put grey to the right and black to the left. Black should have a bigger diameter pipe coming into the Y. Your shower may have its own tank so look on the opposite side of the RV for another handle.
Yet another area where we learned a bit.
On all our new units, we actually use a "gray" handle on the gray tank. Black handle on the black tank. Genius.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).