I have a non-standard bathtub drain flange that I'd like to replace (and also clean up the rust) that has a pair of interior nubs. The drain is 1.75 inches in diameter, and the nubs sit about 0.5 inches down from the top of the flange.
I saw two previous questions (one and two) that describe removing a flange with no crossbars/spokes, but can I take advantage of these nubs and use common tools to remove the flange? I'm concerned that the nubs will even disallow the use of an expanding plug.
EDIT: Also, it would be very difficult to remove the drain with channel locks due to how it's seated in the tub.
Best Answer
You CAN use Channellock type pliers, just not the way in the linked picture/answer shows. You use the handles of the pliers, adjusted to the width of the throat of the tub drain, as spanners. Insert the handles into the drain so they are against the nubs, then turn those pliers by putting a pipe wrench, large adjustable wrench, or another set of pliers on the jaws of those pliers (which are pointing up) and turn counter-clockwise.
I have removed numerous tub drains using this method.