How to remove tub drain?

Question

Take a look at attached picture of my tub drain which is corroded.

I tried this tool with no avail.

When I used more force with that tool, some pieces broke apart from it.

Now I ended up with what you see in picture. Red arrow is pointing to remaining piece of metal drain flange, which is stuck inside PVC drain pipe where blue arrow is pointing.

1. how can I remove remaining metal piece? If I use hammer and screw driver to break it apart, I am worried that it can damage PVC plumbing work.

2. In the process, black rubber gasket came out from area between tub and PVC drain. Did I remove the part I wasn't supposed to ?

3. I can seethe gap between tub and PVC drain pipe. wondering how am I going to seal that gap. With new rubber gasket ?

Answer 1

The way to safely remove the remaining metal part is to use a tool like this:

_{Picture Source: My Garage}

Use the free end of the hack saw blade to cut in vertical direction from the inside of the remaining metal ring. Cut carefully to avoid cutting into the PVC pipe.

Often it is necessary to make several cuts around the perimeter. When the saw has cut almost all the way through it is often possible to then insert a small flat blade screw driver near the cut and a twist will tear the remaining portion of the cut area open. The metal ring should then just peel away. Be careful not to drop pieces down the drain.

Answer 2

There are other tools similar to the one you referenced in your post. I would try them before you risk ruining the tub with a hacksaw. Search for "inside out pipe wrench" or "internal pipe wrench".

https://www.amazon.com/RIDGID-31405-Internal-Wrench-2-inch/dp/B0015B9SF6/ref=sr_1_2?keywords=inside+out+wrench&qid=1660832015&sr=8-2