I was wondering. I know that the heating ducts in an Airstream are located so that they prevent the water pipes from freezing in the winter.

But what happens when one is on the road. Safety dictates that one turn off their propane tanks while towing. How does one prevent water pipes from freezing under these conditions?

Sincerely,

Pete
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Peter K. Kaiser
Thornhill, Ontario
http://members.home.com/pkaiser