I have easy access to the galvanized pipe after it comes into the basement (there's no meter). There's two joints where I can start the new piping (with a di-electric union). The plan is to start with the more distal joint and hope it comes apart without breaking. If it breaks, then I'll go to the more proximal joint (and pray). If that piece breaks, I'll have to learn to use a pipe threader (which I can rent).
So my question: How difficult is pipe threading? How likely is 70-year-old pipe to stand up to pipe threading? What's the best way to cut pipe before threading?
Would anyone recommend changes to the plan?