I had (what i presumed to be) a failing wax ring on an upstairs causing a leak to the ceiling below. I cut a hole in the downstairs ceiling and confirmed water originating from the toilet drain pipe and only when flushed. I removed the toilet and am a little confused about what I'm seeing.
Are there flanges that seal on the OD of the drain pipe as shown in this photo? Is the gap between the brass plate (flange) at the very bottom and the cast iron drain a possible leak point? That gap was packed with wax when i took the toilet off.
A second issue is that I sheared the bolts when removing the top plate/repair flange I have pictured in my hand. They were phillips head so I assumed they would come out but perhaps they were set in the tile mortar bed.
Do I need to do anything to seal that gap I'm seeing around the edge of my drain pipe?
Whats the best approach for reattaching what I assume is this repair flange? Diamond bit to drill through the mortar bed and really long screws to grab the sub floor? Eopxy? Screw into the mortar bed itself?