Quote:
Originally Posted by imenzies76
I used antifreeze last year and it was cold enough to freeze it. Lucky that the lines didn't burst. ....
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The "claim to fame" for RV antifreeze is that it doesn't typically freeze solid, but turns to an icy slush. Even if it does freeze completely, it doesn't expand as it freezes. It's the expansion that causes the damage by splitting tubing, valves, etc.
Many people simply "run some pink stuff through the pipes, when it's pink at the faucet, they're good"... It doesn't work that way. The plumbing is filled with water, when you introduce RV antifreeze into the system, it mixes with the water and, until all of that mixture is pushed out of the plumbing, you don't have "full protection" to the advertised rating on the antifreeze container. What you do have is diluted antifreeze that can still cause damage if it gets cold enough, and yes, that dilution will freeze, expand and can damage or destroy your plumbing system. That's the reason to either "run until the faucets flow dark pink" or "blow the lines to remove as much water as possible before using antifreeze". It's "cheaper to remove the water with air" than it is to "remove the water with antifreeze" so most people in cold climates use a compressor before they add the antifreeze to their system. YMMV.
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