New toilets come in a variety of styles, use very little water and are easy to install.
Most states require both new and replacement water closets to use just 1.5 gallons per flush. Remove the tank lid and flush the closet, holding the lever down to let as much water drain from the tank as possible. Use a plunger to force as much water as possible out of the toilet bowl. Remove the existing water closet Pop the caps from the base of the bowl. Remove the nuts with an open-ended wrench.