Black Water Valve Won't Close
The black water dump valve won't completely close, and it lacks about 1/4 inch of closing completely. I have never had any problems with this before. I'm thinking there may be some toilet paper lodged...
Forum Discussion
Not completely closing is a whole lot better than not opening which is what one normally reads. Suspect the seal might have come loose and is jamming the gate or as you wrote something from the tank is keeping it open. TP is pretty mushy once wet so probably something a bit harder. Loose a toothbrush or hair comb recently? It a good flush as you wrote doesn't solve the problem removing the valve is probably your only option. Pretty easy once your tank is empty. Four bolts and it's out. If you want to make this really easy just replace it.
