Any current Alliance owners particularly with an Alliance Paradigm 310RL where the black tank valve is not working properly. For the past few months the cable has been difficult to operate. What have you done to repair? And where is the location of the black tank valve under the frame area?
Any chance you see a ”Patch” of material under the coach. Some have reported patches of material attached to the underbelly at the location of the valves.
If you don’t see one, a small inspection camera might help you locate it.
Another option would be to remove a couple of the fasteners holding the underbelly in place to get a feel for it’s location.
Repair options depend on what you find and range lubing the cable to valve replacement.
