winterizing black tank flush with air
I've always been successful winterizing by just blowing air through my water lines. I know there is an anti-siphon valve in the black tank flush system. Will just blowing out this line clear water f...
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Me too, I've never blown out my black tank flush in over 12 yrs. I do hope it just drains into the tank when driving down the road. Knock on wood, I've never had a problem either.
