Holding Tanks CF31QB

[DHoskins]

So I’m having trouble finding a definitive answer. Anyone know how many holding tanks are on a 2009 CF31QB? I have multiple dump valves, and not sure if they all lead to the same holding tanks, or if it has multiple tanks. Mine has the optional half bath in the rear master bedroom.

[dagst1]

According to my research without the 1/2 bath 2 tanks - 1 Black and 1 Gray. But with the 1/2 bath in the rear there would be a second black for it. Black dump valves are larger then the gray valves. You should have a large valve toward the rear and a small and large valve toward the front. Could not find a capacity for the rear tank but the front are both 40 gals.

[mark5w]

Sometimes the valve is on the front side.