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Old 12-30-2020, 01:04 PM   #61
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Originally Posted by mkveseth View Post
You have to add it to water for it to work.
Not the pink stuff in the jugs. Use it straight as it is sold.


Adding water is for when you are using concentrated antifreeze for an engine, not for the pink stuff.
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Old 12-30-2020, 05:01 PM   #62
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The key here is that it doesn't expand as water does.
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Old 12-30-2020, 06:45 PM   #63
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The solution does not expand, but the slush does. Fortunately it is mobile and harmlessly pushes out of rigid enclosures.
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Old 12-30-2020, 07:08 PM   #64
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Originally Posted by Spartanguy View Post
Today confirmed my deep mistrust of RV antifreeze. I put two jugs out last night because I knew a neighbor was bringing me over a Christmas plate and just sat the unopened jugs out on a spot of my sidewalk to alert of the ice on the concrete walkway, today I go out and the jug is partially frozen.

I promise I tampered with the solution in no way and removed the seal just today. As frozen inside as a slushy from 7-Eleven. It got down to 12 degrees last night, not -50 btw. Bottle was full, poured some out on my ice spot (not sure if thatís kosher or not, but not the topic at hand either way)

Thoughts anyone?

Merry Christmas,...

SpartanGuy

Attachment 385464
Attachment 385465
Attachment 385466
Yes it will slush. Not freeze....always did that..no problem
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Old 12-31-2020, 01:29 PM   #65
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I imagine some people just drain the system and not blow it out. Not everyone has a compressor or the lungs of an elephant. There will surely be water remaining in low spots or drops that migrate to low spots. Every RV would have a different amount of water remaining, so only general answers can be made.

I always assumed water would dilute and reduce the usefulness of the RV antifreeze. Other posts seem to confirm (though it is opposite with traditional auto antifreeze—I thought the formula had changed to prevent deaths, but maybe I am wrong) that water makes RV antifreeze less efficient, so would pumping the antifreeze through un-blown pipes mix it with enough remaining water to make it work badly in some way? I doubt there is much scientific information this, but I don't read antifreeze journals. Perhaps it does not matter much unless you live north of the Arctic Circle.

The question behind my thoughts is whether newbies should be told they must blow out the pipes to protect them whether they use RV antifreeze or not? The answers may be dependent where you live, of course.
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Old 12-31-2020, 02:39 PM   #66
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It doesn't take that much pink stuff to flush water out of the lines. I watch the color as it fills a clear glass, and then let it flow for a bit after I'm confident that what's flowing is the antifreeze. With lines as small as we're talking about, there is not much mixing going on inside them. The pink stuff just pushes the water ahead of it. I'm not a hydrologist, but it's never been a problem for me.
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Old 12-31-2020, 02:48 PM   #67
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Ethylene glycol remains the most popular antifreeze for heating and cooling applications including engine coolants. It's toxicity is moderate, get very drunk with grain alcohol to slow metabolizing the glycol and manage the produced formaldehyde to low levels. Same strategy for rubbing alcohol which is a bit more toxic.

RV antifreeze is premixed to 50% concentration for protection down to -50 with faucets left open, -20 if faucets, valves and fittings are all closed tightly. If you don't remove the water, dilution will occur so protection is reduced near the faucets depending on how much extra antifreeze is pumped to flush the diluted solution. Pump it till it is as pink as the original and leave the faucets open to let the slush expand.

Edit: there you go, what Richard said.
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Old 12-31-2020, 03:11 PM   #68
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Ethelyne glycol has not been used in new cars for many years. Dexcool and others are propylene glycol...but a different formulation than rv antifreeze.
The early formulations were problematic in some applications.
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Old 12-31-2020, 04:15 PM   #69
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Correction, ethylene is still used. Glycol is not.
Propylene glycol was used in early dexcool.
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Old 12-31-2020, 08:05 PM   #70
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Ethylene GLYCOL remains the predominate cooling system antifreezes in all applications and for automotive engine use as well https://images.oreillyauto.com/uploa...%20Chart-1.pdf
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Old 12-31-2020, 08:16 PM   #71
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Ethylene GLYCOL remains the predominate cooling system antifreezes in all applications and for automotive engine use as well https://images.oreillyauto.com/uploa...%20Chart-1.pdf
https://www-hemmings-com.cdn.ampproj...like-a-rainbow

It has gotten really complicated and confusing, as many aftermarketers brand as dexcool compatible with different formulations. It's about IATs and OATs.

The big problem is incompatible components in various engine systems.
I would advise only using manufacturer recommended and branded coolant....especially on hybrids or EVs with battery cooling systems.
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Old 12-31-2020, 08:48 PM   #72
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"The pink stuff" is doing EXACTLY what it was intended and designed to do.
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Old 01-01-2021, 08:15 AM   #73
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Hi

As long as we're getting into the grubby details. Check out a bottle of Miralax. Read the ingredient list ... there's only one ingredient: Polyethylene Glycol ( PEG ). Yes it's exactly the same stuff as is in our favorite "pink stuff". In addition to a bit of an aftertaste there are other effects of not fully rinsing the lines ...... it impacts both people and dogs ... I have empirical data on this, months of it.

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Old 01-01-2021, 08:33 AM   #74
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Moot...all my 'pink' stuff is used post human consumption.
It goes from where it is now directly into the waste tanks.
Doesn't get put where it's not needed.

Bob
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Old 01-01-2021, 08:35 AM   #75
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Bob, the laxative Polyethylene Glycol is is actually a poly ether (multiple ethyl ethers chained together) and is not used as an antifreeze, but does make a nice food grade lubricant. Propylene Glycol is an alcohol and is used in the pink stuff as an antifreeze. Ethyl alcohol (grain spirits) is also used.
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Old 01-01-2021, 08:44 AM   #76
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Good to know....👍

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Old 01-01-2021, 09:07 AM   #77
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Why I love the air forums

It's sorta like Spock walks into the bar from Cheers and Cliff Claven strikes up a conversation with him, and then a few blokes from Monty Python chip in with irrelevant insights.

Occasionally enlightening, always entertaining.
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Old 01-01-2021, 11:49 PM   #78
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And...

Knock Knock!
Who's There?
Ether!
Ether Who?
Ether Bunny!
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Old 01-02-2021, 11:25 AM   #79
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Quote:
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Hi

As long as we're getting into the grubby details. Check out a bottle of Miralax. Read the ingredient list ... there's only one ingredient: Polyethylene Glycol ( PEG ). Yes it's exactly the same stuff as is in our favorite "pink stuff". In addition to a bit of an aftertaste there are other effects of not fully rinsing the lines ...... it impacts both people and dogs ... I have empirical data on this, months of it.

Bob
Polyethylene glycol (C2nH4n+2On+1) is not the same as Propylene glycol (C3H8O2) as used in RV Antifreeze.
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Old 01-02-2021, 11:57 AM   #80
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Thank you, Bill for pointing out that rather important distinction. Not that anyone here would drink RV anti-freeze, but if someone found themselves in an emergency situation, it's good to know that one can not substitute one for the other.
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