I have a subfloor that is concerte and what a contractor did was cut the pvc pipe to the concerte floor and then glued a flange in why I don't know but the flange is resting on the concerte floor on one side and other side it doesn't sit flush to the concerte floor( about 1/4 to 1/2 inch above). Then they put down ceramic tile to the concerte floor right up to the flange, so now I have a flange that is level with the finished floor( in height) and the flange is not on top on the finished floor and also not anchored to the concerte. So my question's are does the flange need to be complete level on the subfloor? and if yes what do I have to do. The other question is it ok to have the flange even with the finished floor? And do I still have to anchor it to the concerte floor with bolts or is what the contractor did with the glue enough. If not what do I do. I would hate it if I have to tear out the tile around this flange to fix it. Do I have any other options.