Our holding tank air outlet has somehow "jammed". It useually operates as the outlet of air from the holding tank, and it never lets the content out. Which is nice, since otherwise we would have it on the deck, when the tank is full. Now it seems to be permanently closed, since we cant pump anything into the tank, even after emptying it. hen trying we just raise the airpressure in the tank, and the content of the pump and the hose, is slowly pressed back into the toilet bowl.
Question: Can it be repaired? Can a new one be found? With the security valve included. Am I wrong? Is the valve not in the outlet, but somewhere in the tank, or in the hose?
Here are pictures of the thing in question
Outside:
Inside:
Best regards! Jesper Milling