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Old 09-18-2016, 07:41 AM   #1
Junior Member
Join Date: Sep 2016
Posts: 10
Winterizing Black Tank Flush & City H2O

First Winter with a TT (or any RV). After surfing the web, I've got a pretty good understanding of what to do regarding Winterization except for the black tank flush line and the city water line. I'm planning to use a winterizing hand pump to pump antifreeze down both lines. Anything wrong with this?

Now that I think about it, is it necessary to plumb a "converter" to the water pump so it can then pump an antifreeze solution throughout the rig? What if I just use the hand pump to force this solution from the city water intake through the TT's lines? Take too long? More pressure required than the hand pump can handle? This wouldn't fill the fresh water tank would it?

Thing that make you go ...hmmmmm.


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Old 09-18-2016, 09:08 AM   #2
djeirlessr's Avatar
Join Date: Apr 2015
Posts: 54
My 5th wheel has an outside shower that I hook up to the city water connection. I have a 5 gallon container that I put 4 gallons of antifreeze in. I turn the fresh water lever to winterize setting and water heater lever to winterize. I drain the water heater. I open low point hot and cold water valves outside the camper and hot and cold valves inside the camper to drain as much water out of the lines that I can.

I close the valves. I place the hose used to winterize the water system into the container of antifreeze. I turn on the water pump and start opening and closing valves in the sinks when I see pink. I do the same for the shower. Then I flush the toilet until I see pink. By using the outside shower that is getting winterized also.

I then disconnect the shower hose from the city water connection and connect it to the black tank flush connection and run antifreeze into through that line.

I then shut off the water pump and open the low level drains again and when I see pink I close them.
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black tank, tank, winter

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