Heated hose

pianotuna wrote:
TXiceman,

I've boondocked at -37 c (-34 f). I did not feel the need to drain my tanks.

Think he means waste tanks. I also heat traced my waste tanks and valves so they wouldnt freeze so I could 100 gal. batch dump as needed. A camp we wintered over in Whitecourt, Ab. had shallow sewer lines,( only 4') so they could freeze up underground if water did not rush through in a batch.
It isnt just the 3" slinky, it could be underground.
Saw that in another camp ( No. Dak.) where the oil workers had also heat traced and insulated their slinkys. The slow trickle of water through the underground pipes froze solid, then the sewage flowed out on top of the ground.