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Old 08-28-2012, 08:03 PM   #1
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Running antifreeze through the fresh water tank

The other day my neighbor, who is a first year owner of a seasonal camper next to mine, asked me a question about filling his fresh water tanks with antifreeze and pumping it through the trailer verse connecting it through a special adapter.

Now, I've always flushed the line using air or pumped the anti freeze from inside the camper using an attachment.

The only issue I could think of was the leftover taste in the spring after flushing the RV system and sanitizing the fresh water tank. With that said, he (and I) never use the campground water for drinking or cooking water, just for dishes, baths and the toilet.

Of course, he would still turn the bypass off so the hot water tank didn't fill with it. But what other con's to doing it this way should I tell him???
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Old 08-28-2012, 08:17 PM   #2
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he would use a lot more antifreeze he would better with a hand pump if he don't have the inside hose on the water pump
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Old 08-28-2012, 09:27 PM   #3
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There's no point other than using a lot more antifreeze if putting it in the FW tank. That's why they put a line to draw antifreeze directly into the pump.

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Old 08-29-2012, 09:55 PM   #4
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there's no need to put AF in the FW tank, just like no need to put it in the water heater.
AF is for the water LINES! the tanks, including holding tanks, have room for expansion, if there's liquid in them.
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Old 09-15-2012, 12:01 AM   #5
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They'll be tasting that pink cr@p for years!
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Old 09-21-2012, 12:25 AM   #6
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I just purchased a 2006 Surveyor SV264 and this being my first RV the original owner told me that he always winterizes his system by bypassing the water heater but used a funnel to add 4 to 5 gallons of antifreeze to the fresh water tank and then would open the faucets and flush the toilet until the antifreeze appeared at each location. Should I be worried about the antifreeze residue being in the fresh water tank if I decide to drink from the kitchen faucet? Is there a way to sanitize the tank to remove any left over antifreeze? Also with this year and model unit what is the correct process for winterizing and how does it work so I'll know how to winterize later this fall? Thanks!
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Old 09-21-2012, 05:46 AM   #7
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pour 3 gallons of RV anti-freeze in a 5 gallon bucket and use a hose attachment that goes from the pump to the bucket..start at the farthest faucet from the pump. (mine is the rear kitchen sink)then back towards the bathroom,sink,shower and toilet and last the outside faucet for the shower hose.dont forget to drain the hot water tank and by- pass valve so anti freeze doesnt enter the hot water tank first ...before pumping anti freeze
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Old 09-21-2012, 06:00 AM   #8
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As for leftover antifreeze in FW tank, normal spring sanitizing will take care of it. Search here for procedure -several threads about it. Remember RV antifreeze is not toxic or harmful. Just not pleasant to have pink water flowing out of the sinks.

Best practice, as stated above, is not to put it in FW tank (or water heater) to start with.
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Old 09-21-2012, 09:07 AM   #9
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also...you probably have a couple of low point drain tubes... remove the caps on those and drain/ replace caps before pumping anti freeze
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