When camped at camp grounds do you
Leave your gray or black water valve open? I always leave black tank closed and grey water open until we are going to leave. Meaning a day or two in the grey water tank to flush out after draining bl...
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Black closed and both grays open until day of departure. When ready to leave or needing to dump black tank I dump the black, close and fill tank for 4 min (figured for my tank) using San T Flush. Empty and repeat as needed. Usually 2-3 times will show clear water thru the clear elbow. Dump Gray tanks. Flush slinky with gray water hose.
