When you want to remove one you must cut its connection to the waste line as.
How to remove toilet flange from concrete floor.
Discard in a trash bag.
This is basically a durable plastic ring which fits over the drainage pipe to create a place where the toilet can gain solid purchase.
Slip the repair flange spanner under the broken toilet flange but put one of the toilet bolts through the hole in the spanner first in order to easily reinstall the toilet.
Fit the flange over the pipe to place it flat against the concrete floor.
Rest the toilet bowl on its side place it on a towel or cloth to protect the floor and attach the replacement wax ring to the bottom of the bowl this technique helps ensure the ring is in the proper position when placing the toilet over the flange.
With the drainage pipe ready the floor flange must be installed.
Remove the broken area from the flange to be repaired using a hacksaw.
The toilet flange holds the toilet to the floor and is also the fitting that serves as the inlet for the waste line.
Next install a new wax ring.
To replace a toilet flange lay newspaper down on the floor around the toilet and turn off the water to the toilet before flushing and siphoning all of the water out of the bowl.
There are two options this step.