I’d like to convert the lower spout on my outdoor shower (current a tub fixture) to a garden hose spigot. What sort of coupling/fitting do I need to do this? I don't have easy access to the plumbing on the interior of the house (it's sheetrocked in), just the metal pipe that comes through the wall. I also don't have any experience with soldering -- if I can avoid that, great, but otherwise I'm open to learning a new skill.
It's both hot and cold water, controlled by the fixture valve above. I'm assuming that when the new spigot is closed, that will turn on the shower head, and when it's open, that will divert the water through the spigot.