Grey Tank Valve Open or Close
When you spend 1 to 5 months in a park, do you leave grey valve open or close. When close have to empty often. Does it damage anything to leave open except when you want it full to dump with black t...
Forum Discussion
I leave my gray tank valve open, unless I'm going to dump my black tank, then I close it for a few days to build up my gray water supply to help push the black tank material out of my sewer hose. I've been doing this with success since 1976.
