Next install a new wax ring.
Replace toilet flange concrete floor.
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.
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.
Step 5 clean up around the bottom of the toilet and place the new wax ring on the repaired flange.
Then remove the toilet by disconnecting the hoses and unscrewing the bolts on the 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.