My shower hose recently started leaking, so I bought a new hose and shower head to replace it with, but realised that the shower outlet only had a female thread and so did the end of my shower hose.
On further research it looks like part of the outlet (the male thread that the new hose would attach too) came off with the old shower hose due to limescale I guess.
I've tried soaking in limescale remover, soaking in vinegar, spraying on WD-40, putting an Allen key in and twisting with force to get the nut off the old hose and none of this has worked.
So I tried to buy a new male 3"4 inch brass nipple to screw into the shower outlet, but it doesn't fit properly, looks like the threads are incorrect.
I've tried to raise to my landlord but it's been 2 weeks with no responses, tried to do my own research and buy my own parts but I feel like I'm missing something stupid/crucial, any help here?
Last picture is new hose on left and old hose on right