Ok it probably goes to the furnace??? Anyway isolate the line drain it. get a cheap circle cutter 2 repair couplings and a shorty piece of copper thats the right diameter for the existing pipe. Solder flux and copper cleaning cloth. A torch aaaaand i think that's it. For suppliesComes from the furnace but it's cold. Hole is maybe 10ft from furnace. I know from using jb in the past that, if it doesn't work 1st shot I'm more screwed then leaving it