Winterized my RV with this product in Fall, 2012. In Feb 2013 with temperatures at -15 degrees, as a test, a spare bottle I had purchased froze in my driveway!!! Can't tell yet if RV is damaged, but I'm really concerned. Will be vacationing in FL soon and will Flush and pressurize system with water.....I'll be screaming mad if there's damage!!!!!! PRODUCT SAID SAFE TO -50!!!! This is the 2nd freeze up complaint noted on this product, and it was NOWHERE NEAR -50 DEGREES>!!!!!!! I'll be in touch if there's damage!!!!!! OR, I will let you know if system turns out to be OK. That would be only fair.
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