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
Are you sure that is not empty? You can get false readings from the tank level gauge if there is something caught on the sensor in the tank. Try filling with clean water and draining again to see if that will dislodge anything on the internal tank sensor. Also, do you have a black tank flush? If so, you should try flushing the tank with that.
