Hello, We have a pretty old tub which the toe tap drain is corroded. I tried to remove the drain fitting as directions of taking a pair of pliers putting them upside down and twisting the old drain off. While doing this I heard a snap and the piece broke off. So now my situation is that I have a drain pipe still with the metal part of the drain fitting and wont come off. Does anyone have any tips or tricks to get the metal fitting off without damaging the actual pipe?