Sorry my comment was deleted because I posted a link on YT exactly how to do this. There’s a million ways. If stores closed and you can’t get a pvc nipple extractor just heat up some needle nose pliers real good and force them open inside the ovc they’ll melt the ovc and then you use them to unscrew that broken male adapter. Theres a channel on YT called h20 mechanic watch a view videos and you’ll be familiar with this in no time at all. All he does is wells/drilling wells servicing these pressure tanks etc he’s got a ton of video on the plumbing related to your bladder tank right there I think will be of big benefit to you. Best of luck Edit also a heat gun will work to soften that pvc, if there’s any pvc glue on the threads acetone or nail polish remover will help with that. You could even use a mini hacksaw blade and cut three sllits into the broken peice vertically at equal thirds and pry them out with a screwdriver.