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Old 01-31-2019, 11:18 AM   #1
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Frozen Solid RV Antifreeze Concern

I'm near Chicago where we are going through a cold snap -21 air temp yesterday, I went out to the coach this morning and was surprised to see the full unopened jug of -50 RV antifreeze that I left in the coach frozen solid! I thought it stayed jelly-like in cold temps? I sure hope that my fresh water lines are not damaged. I winterized it myself with this product in past years, but we have not been this super cold in awhile. I don't think we went over -50 even with the wind chill.
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Old 01-31-2019, 11:25 AM   #2
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I would take a picture with a thermometer next to jug, then send manufacture a letter if damage is found come springtime.

What's the brand name?
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Old 01-31-2019, 11:41 AM   #3
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I did a video with a thermometer just in case.
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Old 01-31-2019, 11:43 AM   #4
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FWIW, the wind chill factor has nothing to do with lowering the temperature to an inanimate objects. Still it looks like that antifreeze is not doing it's job even at -21*.
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Old 01-31-2019, 11:45 AM   #5
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That is very scary indeed, will be interesting to hear more about this

Very common brand sold in many large chain stores, same brand that is currently in mine
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Old 01-31-2019, 11:46 AM   #6
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Was it rock solid or a little, slushy ?

It doesn't look like it expanded in the jug. That's a good sign.
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Old 01-31-2019, 11:49 AM   #7
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Notice the bottle, it is not swollen. Propylene glycol does not expand like water.

https://www.fvpparts.com/products/fl...antifreeze-50f
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Old 01-31-2019, 11:52 AM   #8
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Notice the bottle, it is not swollen. Propylene glycol does not expand like water.

https://www.fvpparts.com/products/fl...antifreeze-50f
Makes anyone in very cold temperatures sure want to have just antifreeze and not mix with water
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Old 01-31-2019, 11:55 AM   #9
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This from Splash RV and marine anti-freeze explains how it acts, and the difference between burst point and freeze point. I had read somewhere it does not expand like water mixtures, This pdf seems to confirm RV antifreeze does not expand when frozen. IMO each pdf contradicts the other.
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Old 01-31-2019, 12:06 PM   #10
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As stated by others, it's normal for RV water system antifreeze to freeze if the temp is cold enough, but the key factor is that unlike water, it DOES NOT EXPAND when freezing, hence won't damage the water system.
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Old 01-31-2019, 12:29 PM   #11
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That -75* RV antifreeze at Walmart is just a dollar or two more per gallon and has a better taste.
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Old 01-31-2019, 12:42 PM   #12
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That -75* RV antifreeze at Walmart is just a dollar or two more per gallon and has a better taste.
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Old 01-31-2019, 01:36 PM   #13
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Old 01-31-2019, 02:32 PM   #14
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Quote:
Originally Posted by rgvtexan View Post
Notice the bottle, it is not swollen. Propylene glycol does not expand like water.
ding, ding, ding, ding...we're found the winning answer!!

So...why do they call it antifreeze...antiswell would be better
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