Toilet installation is a quick and easy process, and when handled by a plumber, it goes smoothly. Turn off the water supply and disconnect the supply line. Then, the toilet will be unbolted and rocked gently to be pulled from the floor. Next, you will need to install a new wax seal. Anytime the toilet is removed, a new wax seal has to be put in place. Attach the tank and bowl and secure the toilet in place, and you’re ready to go.