The toilet flange is the key piece of plastic preventing a water disaster in your house. Installing a new one is pretty simple. Obviously it is extra easy in this case as I am able to access the plumbing through the basement with no issues.
Do the prep work and with the adhesive needed for the type of piping you have in your house.
Stick your parts together
Do a dry fit to ensure everything sits flat
Measure out any additional pipe that you will need to add
Before final attachements ensure the flage sits level on the floor
Add the final pieces based on what you measured out
In this case I am using a flexible coupling
Before attaching to the floor make sure the attachment points for the flange are equal distance from the wall. (this is critical)
I taped the flange to the floor. I then used a diamond bit to drill a hole through the tile that is larger than the screws I am using for the flange
I also predrilled the wood floor under the tile
Screw the flange down to the floor
Make sure the flange stays level and finish tightening it down
You are all done and the toilet is ready to install