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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I keep the gray open until just before the black needs to be dumped. Then allow the gray to fill some and use that to wash the hose out after dumping the black. Our black requires dumping about twice a week.
