This may be a simple problem, but I'm not so knowledgeable about this section of the drainage system specifics.
So, I have a bathroom sink with PVC trap, and I replaced the popup assembly. The pipes were old, so while I had the p-trap off, I decided to replace it. During the process, with not much force, a 1-1/4 galvanized nipple broke at the galvanized female tee flush with the wall. The nipple had a metal compression nut at the end to connect to the p-trap.
So, the inside of the tee had a bit of rust/nipple material inside, and I did a bit of work cleaning the threads with an old screwdriver, a dremel tool with a disk sander, and using a 1-1/2 inch wire disk brush connected to my drill to help clean it out, along with some liquid wrench which may not have done anything. But it's fairly clean, and I think I could screw in pvc mpt adapter. I can screw in a galvanized nipple a few turns, but not enough to be secure, but I'm hoping a pvc adapter will be more forgiving of imperfect threads (?).
I'm hoping I can use a pvc mpt-to-slip adapter, glue in a small section of pipe, buy the compression nut and washer to go over it, and connect it to the standard p-trap arm, etc. Does this sound right?
I keep reading about trap adapters, but I don't see how any I've seen would do anything useful for this setup even if I could find one the right size. Do trap adapters serve any useful purpose for this case?
I have a plumber scheduled for next week, but if I can do it myself, I can save a couple hundred dollars or more.