RV Winterize
Put RV Antifreeze in my lines once (15 years ago ) never again. Hook up the air compressor at 60 psi and blow the lines out. Once there is no moisture coming out of the lines I'm good to go. I put 1 1/2 jugs in the gray water and the black water tanks through the traps and good to go.
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Not that old,but been around a long time
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