I am repairing a tub overflow. The screws for the cover plate were very corroded and broke off. I am trying to remove the overflow fitting and pipe but it is stuck. The pipe is brass and slides into a brass tee and then has a gasket and compression nut holding it in. I have removed the nut and gasket but the pipe is still stuck in the fitting.
The overflow pipe and tub drain are connected to the tee with compression nuts. The tee connects to the P-trap with a soldered joint.
How can I remove a stuck brass pipe from a brass fitting?
I have tried some PB Blaster but that is probably the wrong chemical for brass corrosion.