90 degree toilet drain too high

[ramm440]

Hello! My problem sucks. Recently had a bathroom flood and the toilet drain is the problem. I called a plumber out he confirmed the 90 degree elbow set directly under the flange was too high in my concrete slab. He replaced the elbow after jackhammering and reset it but I think its still too high and he said this must have been the end of the run when the house was built. The new elbow sticks up about 1-1/4” above the slab right now. We are replacing the flooring with luxury vinyl plank flooring so not much gain there. The elbow seems to not to curve until 2-3/4” inside the elbow female end so that would be where a flange would bottom.
Any suggestions on:
1) How much I could safely cut the elbow?

2) Trim the male side of the flange?

3) Are there toilets that have a recessed drain connection?

4) Is there a thicker toilet bowl floor spacer than what Oatey has in 1/8”?

Thank you for all suggestions

 

[TomFOhio]

They do make closet flanges that will glue down into the pipe. Look up closet flanges. Can't tell if yours is 3 or 4". You could cut that hub
flush to the floor. Make sure your flange will go into the pipe before cutting.

 

[ramm440]

They do make closet flanges that will glue down into the pipe. Look up closet flanges. Can't tell if yours is 3 or 4". You could cut that hub
flush to the floor. Make sure your flange will go into the pipe before cutting.

 

[ramm440]

Here’s what he used and its the 4” opening positioned above slab.

 

[Twowaxhack]

Lay your flooring then cut the pipe off even with the top of the flooring. Then glue your flange inside what’s left. Then anchor the flange through the flooring and into the concrete.