Where do I cut the flange?

Hi,

I am installing a tile floor in the bathroom and found out about this forum from the tile forum. The existing flange is screwed into the wooden subfloor. It has a metal ring that supports the screws and the pvc flange sits on top of the ring (see pic). After looking at all the alternatives (flange extender, extra-thick wax ring, fluidmaster wax-free extender), I would like to raise the flange so that it is level with the new floor once the tile is in place. I think this will give the best results in the long run (do you agree?).

My plan is to cut the existing flange from the inside using my Dremel tool, then after the tile is installed, bond an extender and new flange to the pipe (3 in). However I am not sure where to cut since the flange quickly angles off (you can see how the blue cleaner drips off to the side).

Thanks for any suggestions.

Since you have the floor off, it may be easier to remove some flooring to and work with the pipe below.

If you leave the plywood in place, then you would be cutting the flange off and working from the top.
Is that a 4" pipe below?
It's a bit hard to tell how much room you have to work with on it.
Sometimes you can cut a hub off and split it off from the pipe with a flat blade screw driver. If you are splitting the pipe out of the fitting below, you may want to put a hose clamp around the fitting to prevent breaking the hub of the fitting out.

A flange is supposed to set on top of the finished floor, not level with it. If you have access under the floor, it might be easier to cut the closet bend out and start over with new parts. I would not put the flange on until the finished floor is laid. The glue it to the bend and screw it to the sub floor. Always may sure a new flange is oriented so the flange bolt that hold the toilet are in the right position. I like stainless steel screws to screw the flange to the sub floor. Also, make sure the flange set level on the floor. If you do this, the toilet will set perfectly with a standard thickness wax ring and require no shimming.