Black holding tank won't drain past 2/3
After 4 days of camping we have a full holding tank. I open the black valve and hear a rush of fluids for about 1 min, then nothing. Check the tank level inside and it shows 2/3 full. After searchi...
Forum Discussion
Have you been filling, at least over 2/3 full, the black tank before dumping? If its not full, fill it with water, then dump. This will help to clean the sensors, and if there are solids stuck in there it will help wash them out.
