I have a leak in my shower drain. I would like to remove the drain to replace or re-seal it. I do have access underneath since it is in a ranch. It looks like there is a large ring or nut screwed on from below to tighten up the drain and compress the gasket between the drain flange and the shower floor. The ring/nut on the bottom has some bumps on it and the inside of the drain on the top has some notches in it.
Are there special tools needed to remove the drain?
How do I loosen and tighten this thing?
I am thinking that I may as well get a new drain and gaskets while it is all taken apart. Is the ring/nut thing on the bottom a universal size? I don't see how I would get the old one off or get a new one on.