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Old 11-04-2015, 12:24 PM   #11
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Join Date: Sep 2013
Location: West Des Moines, IA
Posts: 325
The filter will retain water and can expand when frozen so must be removed. Local repair shop confirmed that RV antifreeze actually does freeze BUT does not expand. But he did say that he often replaces the canister that holds the filter on several units each year. He said to just put it on one turn so it can collect any antifreeze that might come that away during the winter.

"Lurch" = Georgetown 2011 330TS
Jeep 2016 Cherokee
Pilot = Bob
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Old 11-04-2015, 02:52 PM   #12
Join Date: Jan 2013
Posts: 64
In the past, I'd remove the filter and add a water bottle, full of water to displace that much antifreeze. The down side of this method, was that the antifreeze didn't suck down as it will with a filter in place. So, it was hard to remove the canister without making a mess with it full of antifreeze. This year, I inserted a tube that fit on the inside of the filter housing that fit the inside diameter of where the filter seals. This allowed me to winterize the system-with less than a gallon, and then pump the antifreeze out of the housing.

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antifreeze, water, water filter

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