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Old 08-31-2016, 02:11 PM   #1
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Join Date: Aug 2016
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Winterizing newbie

We have a trailer that is permanently parked in a campground. We've been paying someone $100 a year to winterize the trailer. I thought I would tackle it myself this year. I've read up on it and watched videos. All seems pretty straight-forward, except for one thing.

The trailer has a regular flush toilet (the same that you would have in your house). It's not a trailer toilet. I'm wondering about how to deal with it, and when in the winterizing sequence I would be doing it. I'm thinking that after I drain all the water (but not flush the toilet, keeping water in the tank) and I fill all the water lines and faucet with anti-freeze, that it's at that time that I would flush the toilet to drain the tank and get some anti-freeze into the fill valve of the toilet. There is no toilet shut-off valve and I don't want to waste anti-freeze by pumping in more than I need to. Any thoughts?

Since this is my first time, if I buy too much anti-freeze is it okay to keep the unused jugs till the following winter?

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Old 08-31-2016, 02:25 PM   #2
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Join Date: Nov 2015
Posts: 186
The unused antifreeze will keep year to year.
I'm not sure how much antifreeze it would take to fill the trap on the toilet. I would get as much water out of the bowl and trip as possible with a siphon and towels so the antifreeze isn't being diluted by the water.
As long as there is no water in the line going in, the tank and the bowl you should be good.

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Old 08-31-2016, 02:32 PM   #3

Join Date: Oct 2015
Location: Round Lake IL
Posts: 37
Originally Posted by jdbuss View Post
to winterize the trailer
Can't believe we are turning the corner to these types a discussions. Where did the year go
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Old 08-31-2016, 02:47 PM   #4
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Join Date: Apr 2015
Posts: 37
It is pretty simple to winterize the water system in a trailer. I don't know what your setup is but I'll tell you how I do mine.

1. If I know I am done camping for the season I drain the black tank. I fill the tank twice and drain. I have a black tank flush system that I use after draining the tank leaving the tank valve open until I am done.

2. I drain the grey water tanks, and fresh water tank if I have water in it. I open the low point drain valves and open faucet. I remove the water heater plug and lift the pressure relief valve to drain the water heater.

3. I close the low drain valves. My trailer has a lever to bypass the water heater and another valve to by pass the fresh water tank. I place both on the winterize side. I have a 4.5 gallon container I use to use on previously owned boats. You don't need 4 gallons of antifreeze but I prefer more than not enough. My trailer also has a plastic tube that I put in the container of antifreeze. I also have an outside shower so I connect the hose from that to the city water connection.

4. I turn the pump on and turn on faucets, one at a time until I see pink antifreeze coming out. I do this for the kitchen sink, bathroom sink, and shower. I then flush the toilet, mine is porcelain, until I see pink.

5. I turn the pump off and open a hot and cold on one of the faucets, go back outside and open the low point drains. I don't for the fresh water tank because I don't put anything in it. When I see pink I close the low point valves and the hot and cold on the faucet.

6. I take what is left of the antifreeze and pour a little down each drain. I pour some down the toilet into the black tank. I leave a little in the toilet to keep rubber seal from drying out. Since the toilet is porcelain I don't need to worry about the antifreeze staining the bowl.

The reason I hook the outdoor shower hose to the city water hookup is so I don't forget to winterize that too. It is used to winterize everything.
I takes maybe 20 minutes and around $10 of antifreeze.
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newbie, winter

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