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Old 10-19-2008, 01:44 PM   #1
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Hi Everyone,
I just finished winterizing my class C motorhome by blowing out the lines and then pumping antifreeze throughout the freash water system. This is only my second year doing so. Did the same thing last year.
Although the antifreeze in its pure form will not freeze I have seen a mixture in which a small part water and large part antifreeze will turn to slush or freeze.
Therefore, being new at this, I wonder why it would not be better to now open the low water drains and let whatever antifreeze that will drain out leave the system and essentially have the lines empty with only a residue of antifreeze as opposed to having all the lines full.
I have not heard of nor read anything regarding the benefits of doing this. Everyone seems to leave the lines full till spring.
Any comments or advice? Would condensation be a problem in the empty lines?
Don
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Old 10-19-2008, 01:44 PM   #2
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Hi Everyone,
I just finished winterizing my class C motorhome by blowing out the lines and then pumping antifreeze throughout the freash water system. This is only my second year doing so. Did the same thing last year.
Although the antifreeze in its pure form will not freeze I have seen a mixture in which a small part water and large part antifreeze will turn to slush or freeze.
Therefore, being new at this, I wonder why it would not be better to now open the low water drains and let whatever antifreeze that will drain out leave the system and essentially have the lines empty with only a residue of antifreeze as opposed to having all the lines full.
I have not heard of nor read anything regarding the benefits of doing this. Everyone seems to leave the lines full till spring.
Any comments or advice? Would condensation be a problem in the empty lines?
Don
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Old 10-19-2008, 03:52 PM   #3
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While I do not blow out the lines first,I do pump them full of the pink stuff via the suction side of the water pump. I then recover about 50% of the pink stuff for reuse next year via the low-point gravity drains. I've winterized this way for at least the last 15 years and with temps down to near 0 deg F I've had no problems.

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Old 10-19-2008, 04:12 PM   #4
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I can't see any reason why you couldn't recover the antifreeze right away instead of waiting till spring.

Remember to leave some antifreeze in the drain traps, though.
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Old 10-20-2008, 12:57 AM   #5
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I would rather keep the lines wet if you have ever been in a high mineral water condition. The scale on the inside walls of the pipes will flake off when dried out and cause restriction problems.
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Old 10-22-2008, 05:33 PM   #6
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For the low cost of a bottle of antifreeze vs. the much higher cost of burst pipes or valves - I would leave the antifreeze in all winter.
Especially if you have an icemaker - these can pop very easily if not properly winterized. I learned the hard way!
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Old 10-23-2008, 05:12 AM   #7
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Although the antifreeze in its pure form will not freeze I have seen a mixture in which a small part water and large part antifreeze will turn to slush or freeze. </div></BLOCKQUOTE>
My pink stuff has turned to slush a few times. It is my understanding that RV antifreeze will freeze, it just does not expand as water does.

I also vote for leaving A/F in the system. The pink stuff will keep seals and o-rings from drying out JMO.
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Old 10-26-2008, 02:33 PM   #8
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The pink stuff turns to slush, but doesn't turn to ice and expand like plain water does. So there's nothing wrong when you see it turning to slush.

I winterize by first blowing out as much of the system as I can. Then I add pink stuff to any components that don't respond well to blowing out such as: P-traps, lines to water filters, ice maker, washer/dryer and the FW pump.
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Old 10-26-2008, 03:55 PM   #9
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VERY nice web site for the furry members of your family. Dogs rule!


Bob
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Old 10-28-2008, 08:33 PM   #10
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Antifreze in our toilet always turns into slush.

Heres another question on the subject. If you already have water in the lines and then you pump the pink stuff in, does it mix with the water in the lines or does the water exit the lines completley as the pink stuff enters. I know I see water come out of the taps first followed by the pink stuff but I always wonder if the pink stuff is a mixture of water already in the lines.
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Old 10-29-2008, 04:51 PM   #11
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by CoastieSCPO:
VERY nice web site for the furry members of your family. Dogs rule!


Bob </div></BLOCKQUOTE>

Thanks!

Steve
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