Some time you don't have a choice about going out in the cold. I went to Daddy's for Christmas just a few more than a couple years ago, and the temp was at zero when a cast iron drain pipe going from his shower to the ground decided to freeze up. He had water dripping to prevent freezing of the supply lines, but it needed a place to go. I had just brought Daddy a set of bottles for his torch, so we fired it up and used a #14 rosebud to thaw it out while lying on my side under the house. That torch didn't help much in keeping me warm, but it did thaw the pipe. We grabbed some insulation and covered it which helped, after that. Daddy's house was a summer home when it was built, and they always drained the water before leaving so it didn't have enough insulation on the pipes for that sort of cold. Hard to fix the problem of not enough insulation on the pipes after the walls are sealed up.
David from jax