Winterized w/compressed air
I winterized my TT with compressed air through the city water inlet with my compressor set at 25 PSI. I went through and opened each valve one at a time for over an hour. I uncapped the low point dr...
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You mention opening the low-point drains, but did you also open the fresh water drain valve to empty the tank? There should be one under the tank under the trailer. You'll probably have to get down and look under the fresh water tank.
