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Old 08-20-2008, 02:17 PM   #1
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How Long Will Antifreeze Last?

I winterized my 78-31' AS as usual last fall prior to the opening of hunting season in MT. Skip forward to Aug. 08 and due to a number of unforseen circumstances, (forest fires, family circumstances, etc.) I have still not had the chance to drain the antifreeze out from the lines. It is mid-late Aug. and I would normally be winterizing in about 1 month or so. My question is this - can I just use the antifreeze from fall 07 for another winter and just leae it in the lines as is or has it degraded after roughly 1 year to the point where I should blow it out/drain it and replace it. I would prefer to just leave it alone if I can but I don't want to risk the plumbing. Thanks - Andy.
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Old 08-20-2008, 02:27 PM   #2
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hi montana'

there are examples of winterized rvs that go 2-3 winters without issues.

the antifreeze does evaporate, although more slowly than water.

2 cups placed in toilet bowl, to protect the seals might be gone is 3-4 months depending on weather.

even the best plumbing isn't sealed so tight that line liquids don't evaporate, include water residuals...

so that means the lines might be virtually dry and not subject to freeze damage anyway.

otoh, many feel leaving a liquid IN the lines is good for joints, gaskets,seals, valves, tanks and fixtures.

i would add more antifreeze, but either approach can work...

besides don't the tires need air and the critters need company!

lastly REMOVING the pink residue may take a lot more effort after 2 winters.

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2air'
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Old 08-20-2008, 02:28 PM   #3
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Did you blow out the lines last year. I was wondering if it was diluted with any water? I have left mine in the lines for more than two seasons without damage, but I am not sure of the proper answer. Just my experience.
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Old 08-20-2008, 03:54 PM   #4
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It should last indefinately, if not diluted. With proper care it may well be said that: Many are chilled, but few are frozen!
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Old 08-20-2008, 04:53 PM   #5
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Its fine. I have left mine go for a few years, when I was going through some issues. The biggest thing is, There is no water in the lines esspecially in small passages like toilet because the antifreeze has pushed it threw and out. Nothing to freeze, even if you had air you are still fine, I have done mine with just blowing out the lines. The problem I had with that was dry seals. The residue was a pain but a few flushes with bleach and water and I was set.
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Old 08-20-2008, 05:01 PM   #6
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I usually run the pink stuff through the lines to push the water out. When it all runs pink I then drain the antifreeze out. There is no water to freeze so you don't need the pink stuff in the lines.
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Old 08-20-2008, 06:05 PM   #7
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A long time

Back in 2004 I purchased a 1966 Overlander that had not been used after being winterized in Nov. 1981. I hooked up the water line, pushed the old pink juice out and went camping. No leak, no bad pipes, etc... So, I say it should last 23 years!
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Old 08-20-2008, 06:26 PM   #8
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Quote:
Originally Posted by rideair View Post
being winterized in Nov. 1981...
did you drink a little to see what it really was?

that may have been ethylene glycol http://en.wikipedia.org/wiki/Ethylene_glycol

not propylene glycol http://en.wikipedia.org/wiki/Propylene_glycol...

or pink moonshine



cheers
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Old 08-20-2008, 06:31 PM   #9
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All I know it was pink.
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Old 08-20-2008, 10:36 PM   #10
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DONT drink it!!!!
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Old 08-20-2008, 11:30 PM   #11
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filamingo juice perhaps?

Quote:
Originally Posted by rideair View Post
All I know it was pink.
so it could have been THIS stuff!

http://www.airforums.com/forums/f161...tml#post145461

cheers
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Old 08-21-2008, 09:45 AM   #12
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Antifreeze

Thanks for all of the input. Yeah, I blew out the lines with an air compressor like I always do prior to pumping the antifreeze throughout the lines (sinks, shower, toilet, hot water heater, put some in the grey water & holding tanks too). I also used the Prestone antifreeze this last time around which is more expensive so it must be better huh? Sounds like I will be safe for another winter. Thanks again, Andy
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Old 08-22-2008, 05:35 PM   #13
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Make sure its not pretone auto antifreeze.... BIG differance
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Old 08-22-2008, 07:37 PM   #14
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Hmmm...

I've had my AS for 6 years now and have never had water in it. PO said it was blown out and winterized when I bought it. I do know it has the pink stuff in it as it used to drip from the galley faucet if you opened it. Maybe someday I'll hook it to a hose from the house and see.
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