Originally Posted by bob7794
Are the two tanks connected or can they be connected?
The reason there are two gray tanks on some models is that the layout of the trailer prevents, or at least makes it very difficult, to plumb both the kitchen area and bath area into one tank. On mine, the kitchen is in the rear and the bath in the middle. It would be not be feasible to have only one tank due to the layout. Hence, you would not be able to connect the two gray tanks.
You can get a V connector to connect two hoses to a single connection at the campground sewer connection.