Heat tracing on water lines

[Jls]

Has anyone contemplated placing heat tracing on water lines?   I see two reasons...1. eliminate worry while on the road during springtime cold snap after dewinterizing and 2.  possibly eliminating the need to winterize at all.

[Snackchaser]

 

12 volt heat trace is about 3 watts per foot, and I'm not sure how you would calculate the length needed to protect the hot and cold loops.  We picked up our trailer during a terrible ice storm with icicles hanging off the trailer while going down the road.  There was real concern of freezing pipes.  We said: Damn the warnings, we're running the gas furnace while going down the road!