Winterize Your Small Travel Trailer Water System

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Will Your Small Travel Trailer Face Freezing Temperatures?

'Tiz the season!

It's that time of the year. Winter will be here soon. As a result, camping season is over for many of us. Not only will our trailer will sit beside the garage for the next many months, but we'll have to see it daily and wish we were going camping. Unfortunately, it won't get used again until spring.

We're not in Florida any more

Up until a year ago, we lived in Orlando and never got much cold weather so I wasn't concerned. But that's all changed now because we've moved to Tennessee in 2020. Last year we had a lot of weather in the low twenties. In other words, it froze here. In fact a few times it even got down into the teens. This may not mean much to you, but for us Floridians it was cold!

Obvious I now need to prepare our trailer for winter. Last year it seemed like a lot of work, but this year was pretty easy.

Winterize your small travel trailer water system?

Do you live in an area that gets low temperatures and freezing weather in the winter? If so, you will need to winterize your water system. Doing so will prevent any water remaining in the lines from freezing and creating leaks.

Simply draining your water is not sufficient because water can remain trapped at various places in the system. You must drain the water from your system and then blow out any that remains. But to be really safe, you should then fill the entire water system with RV Antifreeze. I know that some people skip this last step, but I don't want to take any chances.

Things you will need

Portable Tire Inflator
Air Compressor and hose with quick connect fitting or Portable Tire Inflator

This is used along with the Blow-Out Plug below and will force the remaining water out of the system after draining. If you don't have an air compressor already, you can also use a portable tire inflator.

I have a compressor, but I also have a portable tire inflator like the one pictured that I always take with us when we travel.

Blow Out Plugs
Blow-Out Plug

This attaches the compressor or tire inflator hose to your water inlet. The top one in the photo is used if you have a compressor hose with a quick-connect fitting and the bottom one is for use with a tire inflator.

RV Antifreeze
RV Antifreeze

Be sure to get the pink stuff for RV water systems an not the poisonous kind used in your automobile radiator. Check your owner’s manual to see if it says how much you’ll need. For our trailer, I’ve found that if I raise the front a bit so all the liquid runs to the back of the fresh water tank, I need 2 to 3 gallons.

By the way...For some reason this stuff was terribly expensive on Amazon this year. I found it at my local Walmart for less than a third of the price on Amazon.

The procedure I use

Please Note

The following is the procedure that works well with our Casita. Be sure to confirm the steps to be used with your trailer. Everything should be similar, but there could be some differences.

    Get the bad stuff out
  1. Turn the water heater bypass valve to the position to prevent water from entering the water heater.
  2. Crank up the front of the trailer a bit to help water drain from the fresh water tank and better fill the system with anti-freeze. (You will need to check your trailer to see if this will help or not in your case.)
  3. Drain the sewer storage tank(s), fresh water tank, and water heater tank.
  4. Open the sewer storage tank drain valves, all water faucets, and prop open the toilet drain.
  5. Connect the blow-out plug to the city water connection and also to the compressor hose.
  6. Make sure the compressor is set to a maximum pressure of exceed 50 psi, and then turn it on to blow out all remaining water from the system. Once I start the compressor, I close faucets and leave only one open at a time to make sure every line gets blown out well. To avoid creating any leaks, I always make sure that there is at least one faucet open while the compressor is running, just in case the pressure was too high.
  7. Close the sewer storage tank drain valves.
  8. Put the good stuff in
  9. Add the RV anti-freeze to the fresh water tank.
  10. Open the faucets and turn on the water pump to push the antifreeze into all the lines. Turn off each faucet once you see the anti-freeze flowing out of it. Also, be sure to flush the toilet until you see anti-freeze flowing into it.
  11. Pour some additional RV anti-freeze into each of the drains if needed to allow a little to go into the traps and sewer storage tanks.

That's it!

Of course there are some other things you should also do to get your small travel trailer ready for winter, but I'll leave that for another article.  You can also download my free Beginner's Guide and read the section on storing your trailer.

As always, drop me a note on the Contact page if you have any questions.

For more information or to purchase the products mentioned in this article, click the images below to access the related product page on Amazon. Thank you for supporting our sponsors and advertisers.
Air Compressor
Blowout Plug
Blowout Plug
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Denny Johnson

Denny Johnson

My wife Fay and I live in Knoxville, TN, and we love traveling with our Casita. I created tinyTowable.com to share things we've learned along the way and hopefully help others. Be sure to check out all the information, the campground reviews, and especially the free Small Travel Trailers Beginner's Guide . If you like what you find, please subscribe to my Emails so you don't miss any future articles.
 
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