I am desparate, and really need help. I am replacing the cartridge in my shower, and the when i was yanking the old one out, only the inner part came out (aargh!). the outer part, seemingly, is stuck to the pipe. i'm squirting a lake of vinegar in there, but it's not helping (eek). facts you should know:
:: it's just a shower, not a tub.
:: it's a moen cartidge (both old & new). the old one's been in there for about 30 years
:: the handle is single, not double
would heating it help or hinder? what about hammering a nail-punch to the inside?