There is no 3-way bypass in the D13.Changing the subject…
Winter is coming in a couple months and I have been thinking about winterizing my D13. My old travel trailer had a 3 way bypass valve with a small hose extending out where I only needed to turn the valve and put the hose in the antifreeze jug.
I’m not seeing anything like that in my Dweller. Any ideas or recommendations on how your winterizing your Dweller?
Last fall I started winterizing my D13 with antifreeze. Then I read the Truma Combi manual and determined that the hot water tank should not be stored full of antifreeze. So, I drained and flushed all of the antifreeze with fresh water and then drained and blew out the water system. It was pretty straight forward.
Here are the basic steps I took:
- Drain both fresh water tanks.
- Briefly run the pump and alternate the supply valve to ensure the supply lines from both tanks are empty.
- Empty water out of the suction strainer that is located right before the pump.
- Hook an air flush adapter to the city water fitting.
- Attach a regulated air supply. 30 psi may be safe, but 20 psi is more than adequate. You can even use a bicycle pump.
- Blow out all of the hot and cold lines by opening the faucets. Start at the highest fixture and work your way down.
- Ensuite Shower
- Ensuite Sink
- Outdoor Shower
- Galley Sink
- Draw-bar Spigot
- Open the pressure-relief/drain-valve on the Truma Combi under the bed to remove any remaining water in hot water tank. See Truma instructions for location.
- Repeat previous 2 steps until you are confident all water is out of the fresh water lines.
- Drain the supply tank for the Thetford cassette toilet.
- Run the flush pump to clear any water remaining water from the toilet flush water system.
- I believe some people add RV antifreeze to the toilet water supply and flush pump. I did not do that.
- Ensure the gray water tank and toilet cassette are empty.
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