Loud explosion while backwashing black tank
Today I was doing my regular duty of emptying/backwashing the black water tank. I had emptied both the grey and black tanks and was in the process of backwashing the black tank. Now I know it says not...
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I leave the black tank valve open while using the black tank flush. At the same time I also pour a few 5 gallon buckets of water down the toilet to help rinse the tank.
