I have followed a number of videos, but they all seem to have a copper (?) stem. At this point I'm up to some plastic piece that has no notches (namely around the metal piece) to use a wrench on.
Where do I go from here? I'm thinking that I would pull it out, but don't want to risk it without being sure.
It is leaking, so I'm probably looking to replace more than just the knob.
[EDIT] I went to Lowe's and they cannot help me without knowing the brand. What would be a way to determine the brand? I do not see any labels, here are more pictures:
Best Answer
If you're not worried about possibly damaging the plastic bit (after all you are looking to remove it), I would get a pair of vice grips onto the square section at the back of the plastic piece.
This will allow you to either rotate the plug (to un-screw it, if it's threaded or to break the bond if it's glued in), or apply horizontal force to pull it out without damaging it too much.