When replacing a toilet it s fairly common to discover that the existing toilet flange will not work for the new toilet.
Replace toilet flange concrete floor.
Step 5 clean up around the bottom of the toilet and place the new wax ring on the repaired flange.
There are two options this step.
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.
When the subfloor is concrete as is often the case with basement bathrooms or other slab foundation situations replacing the flange is no easy matter since it can be quite hard to drill holes in concrete to secure the new flange.
Then remove the toilet by disconnecting the hoses and unscrewing the bolts on the floor.