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Old 10-07-2018, 12:54 PM   #1
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Join Date: Aug 2018
Location: WA
Posts: 12
First time Winterization

Hello group, first year with our new rig Sunset Trail 239BH. Had the dealership winterize it and just picked it up yesterday.

Question: Are there any recommended steps to winterize the black tank?

I flushed it out thoroughly with the hose-flush connector. I was considering pouring a few gallons down the toilet and placing one of our “orange fresh” packets and let it sit over the winter. Then putting a few inches of water in the toilet itself to keep down any fumes.

I’m in the the Seattle area so our winters are mild and the rig will be inside a barn covered, I’m not so concerned with freezing temps, just looking for best practice and tips for the black tank. Thanks group
TV: 2014 Durango RT 5.7L
TT: 2018 Sunset 239BH
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Old 10-07-2018, 06:40 PM   #2
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Location: N.C. Mountains
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When I finish up for the winter, I clean the black tank out well with the tank flush and fill it a couple of times and dump it. Then the only thing that goes in it is the antifreeze that I flush down the toilet by letting the antifreeze cycle through the flush system. Once the pink stuff starts coming out when I flush it I stop. That’s all I do. I don’t know what they charge you to winterize your unit but it only takes about $6 or a couple gallons of RV antifreeze if you do it yourself. If I was you I would learn to do it yourself, then you know it’s done right.
*2016 CAF25SE Cruiser Aire 5er/*Joined 2010 *Changed Username and lost Post #'s -2012.
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Old 10-07-2018, 11:19 PM   #3
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Join Date: Jul 2017
Location: Saskatchewan
Posts: 345
Muggs, I'm not exact what you mean by mild winters, but if that includes anything freezing at all, even for a one night, then you better eliminate everything that holds water, everywhere. There are just to many fittings hidden in places that you have to stand on your head to get to that will take the fun right out of plumbing, and camping. You know the saying, preventative medicine now, or a whole lot of learning later, the hard way, lol..
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Old 10-08-2018, 05:19 PM   #4
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Location: Breckenridge,CO
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I've been doing exactly what Papa-T does with 7 trailers over 15 years. Have not had a single problem. Now I just jinxed myself!

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Old 10-14-2018, 02:19 PM   #5
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Join Date: Oct 2011
Location: Hollis, NH
Posts: 235
After cleaning out your black tank, do 1 or the other of the following.
1. Dump enough entifreeze into the toilet to cover the dump valve, close the toilet flush and allow just a ought anti-freeze to cover the seal .
2. Leave the dump valve open to allow a winter condominium for all the mice and other rodents to climb into your tank for the winter!
Your choice. I know what mine would be.
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