We must have hit a bump, the holding tank started leaking. Then we saw there was an old patch on it. Tried to repatch and gave up and a mobile rv service came and removed it for us - that was a major hastle. Now they are asking US where to order a new one from. I don't know the size, it might be 20 x 26 x 11 (written on it). I don't know how many gallons it holds. Any suggestions on the specs and where to get one? What is the deal, I love our rv, but there is ALWAYS SOMETHING!