Frozen antifreeze - winterize concern?

[Iraqvet05]

I checked on my TT this morning to find the anti-freeze in the toilet partially frozen. A month or so ago, I winterized by blowing out the lines then running antifreeze in them as a backup measure. I don't recall if the 2" of water in the toilet is from pumping it thru the lines (which could have diluted the antifreeze) or if I poured it directly in the bowl. I had some antifreeze in the jug that was fine and added it to the toilet . Should I see ice forming in antifreeze with only a mild freeze? The lows have been in the teens the past few days.

[SkyBound]

Not to worry. RV antifreeze isn't made to not freeze at all. It is designed so that if/when it freezes, it does not expand as water does. Sounds like you're just fine.

[Jagiven]

I have seen leftovers in the bottle in my garage slushy, never have paid attention to what temp that appears to happen at.

[SkyBound]

https://www.youtube.com/watch?v=h3d2DGIPEAQ

[Clayton4971]

Originally Posted by SkyBound

Not to worry. RV antifreeze isn't made to not freeze at all. It is designed so that if/when it freezes, it does not expand as water does. Sounds like you're just fine.

Learn something every day ! I would have also wondered what the heck was going on. Used the stuff for years and never paid attention .