Grey tank odor?
So, I winterized the Travel trailer right after my last trip, about a month and a half ago. Drained the low points, the grey tank was drained, black tank had a couple of gallons of water in it (which...
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But yes it would help prevent future problems by keeping something in the tank. RV antifreeze if you need it; a gallon or two of water with a dash of detergent and bleach otherwise.
