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Depending on the tank.. If you can drain the main tank completly then that is an option, I can't drain mine completly (Well I can but not easily)
Plus it is easier to suck it out of a gallon jug than to pour it down the gravity fill on many RV's. Many Many Rv's.
That said.... I use the "DRY" method.. I figure that once I"ve blown nearly all the water out, leving only a few drops here and there, If the air in the lines freezes.. I won't worry about it,, I'll be dead (Can not brethe frozen air after all)
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Home is where I park it!
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