I managed to get my water bay panel out just far enough to reach behind to change out the two electric waste tank drain valves. I had two problems regarding getting that panel out far enough to work behind it. First, the water hoses going to the back of the water manifold and second, the wires going to the back of several toggle switches are only barely long enough to pull the panel out about 12 to 18 inches. Some folks have lengthened the hoses and wires specifically to better access behind the panel.