Thank you for the advice everyone. I didn't see RDspaguys warning before attempting, but I was successful at very slowly and carefully heating up the piece and carefully removing it without damaging the jet back. Successfully replaced the broken pipe, and today successfully ran the tub and new heater with no issues. (This tub was taken apart at the pump when I moved into this house so I've been trying to get it running without putting too much extra $$ into it as we will be removing it in a few years for a master remodel anyway)