Disconnect the water supply tube from the shutoff valve using a wrench. Be sure the valve is closed all the way.
Pry off the rounded caps that cover the closet bolts, then use a wrench to remove the hex nuts.
Very carefully lift the toilet by the bowl, not the tank, and set it down on an old blanket or cardboard sheet.
Scrape off all the old wax gasket from the closet flange. Note that a section of the flange is broken off.
Slide a repair strap under the closet flange after loosening the screws that secure the flange to the floor.
Set the new wax gasket down on the closet flange, making sure it’s centered. Note that both closet bolts are in place.
Connect the new water supply tube to the threaded fill-valve shank on the bottom of the toilet tank.
Press down on the toilet bowl rim to compress the wax gasket. Tighten the closet bolts, then press down again.
Use a close-quarter hacksaw to trim off the tops of the closet bolts. Tighten the nuts before replacing the caps.
Connect the water supply tube to the shutoff valve. Then open the valve, flush the toilet and check for leaks.
