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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Terryallan wrote:Yosemite Sam1 wrote:
Unless it's full, I don't think it will do harm.
Pipes and water tubes burst with the expansion of water when it freezes in confined space.
This is what you want. No need to empty the black tank. In fact it is not a good idea to completely empty the black tank. You seals will / can dry out and start to leak. plus the dreaded dry tank smell.
Water heater doesn't completely empty of water either with drain plug sitting a littler higher than the base of the tank. But it's insulated too so no worry.
