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Old 01-06-2016, 07:09 PM   #15
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I think I will add oil too, I had new seal put in last year, they are tender and need care.
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Old 01-06-2016, 07:21 PM   #16
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I've tried both the good quality antifreeze for marine use and the wally world stuff. The latter is garbage. I used it once and it took forever to rinse out after winterizing.

Your local chandlery or West Marine carry really good quality antifreeze. That said, we no longer use it now that we have drains in all low points and blow the entire system out well. Colin Hyde describes the technique well in one of thevap episodes.
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Old 01-06-2016, 07:33 PM   #17
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If it frozed in the bottle it will freeze in the lines...that's my reason for blowing the lines for at least 20min @ a steady 30psi, pump AF thru and blow again 'til it mists pink.
Antifreeze rated for -50°F has a freeze point of +12°F (I just now looked it up). That's when it starts to form slush, ice crystals in a liquid suspension. Antifreeze is a eutectic mixture, made of components with different melting/freezing points. It starts to freeze at +12°F— forming a slush— and finishes freezing at -50°F— forming a solid.

It's important to shake antifreeze thoroughly before use because otherwise the components can separate and develop a frozen layer along with a liquid or slush layer, and thus provide a lesser degree of protection. That's probably what happened with the OP's jugs. They were left to sit, and the components separated. One component froze.

I thank the OP for starting this thread. It gave me a chance to learn something new.
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Old 01-06-2016, 07:46 PM   #18
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I recall there are two basic kinds and a third which blends the two. Ethenal (SP?) is the worst which is flammable and ruins seals and poly- something or other which is better. Then I read they recapture some of it and resell but it may have foreign chemicals in it, so they say get virgin stuff

After much research I found the Prestone to be the virgin good stuff.
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Old 01-06-2016, 08:00 PM   #19
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I think I will add oil too, I had new seal put in last year, they are tender and need care.
Just add the veggie oil, no AF, water or other stuff.....I tried Olive oil, it worked but I couldn't get used to the tas...never mind.

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Old 01-06-2016, 08:06 PM   #20
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Thanks ProtG, what u say makes sense, off to fine a better grade then add my veggie oil. I was spouled by our mild weather. The night it frozrpe it wS4' with lots of wind, factor wind chill and, selarTion od ingredients and bingo.
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Old 01-06-2016, 08:35 PM   #21
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The night it frozrpe it wS4' with lots of wind, factor wind chill and, selarTion od ingredients and bingo.
More fun facts to know and tell— wind chill makes absolutely no difference to when something freezes.

Here's an example that illustrates the point, using the National Weather Service wind chill chart for reference… At a temperature of 40°F, above freezing, a wind of 30mph lowers the wind chill to 25°F, supposedly below freezing. Will water freeze under these conditions? No, because regardless of the wind chill, the actual temperature is still 40°F. Wind chill affects how fast something gets cold, but doesn't allow anything to get colder than the actual temperature.
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Old 01-06-2016, 08:44 PM   #22
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...Most other natural and manmade liquids contract when they freeze...
George Costanza would definitely agree with this statement!
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Old 01-07-2016, 12:24 AM   #23
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I've tried every brand available in Fairbanks and the are all solid by -15F. As said they don't expand but are way past slush.
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Old 01-07-2016, 09:02 AM   #24
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Try using cheap vodka. It will never freeze and leaves zero taste in the plumbing. Been doing this in my Airstreams for 25 years!
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Old 01-07-2016, 09:14 AM   #25
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Try using cheap vodka. It will never freeze and leaves zero taste in the plumbing.
Not true. 80-proof vodka freezes at about -16°F. 100-proof vodka freezes at about -40°F but that's certainly not the cheap stuff! 190-proof Everclear freezes at -173°F, providing adequate protection even for the great frozen North as long as it's not in contact with anything made of rubber. And because vodka only has two ingredients, ethyl alcohol and water, the high water content (60% water for 80-proof, 50% water for 100-proof) means that vodka will expand when it does freeze.

Alcohol has the effect of drying and cracking rubber seals over time, unlike RV antifreeze.
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Old 01-07-2016, 09:33 AM   #26
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Try using cheap vodka. It will never freeze and leaves zero taste in the plumbing. Been doing this in my Airstreams for 25 years!
A Airstream with two wet bars. Let me know when you have the dewinterizing party
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