Just out of curiosity, how much water would there be in a system and how would it freeze and ruin things. I guess what I wonder is wouldn't the water (assuming you drained it) that remains just freeze and move along the piping? (I don't know how else to explain it).
I winterized mine again this year, so it's really just curiosity, but I wonder how much water you could have in the system and be OK.
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