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Replacing an existing toilet is a straightforward task because the supply and waste pipes are already in position. If you want to install a toilet in a new position, it requires more complex rerouting that is best done by a professional plumber.
The standard toilet design, where the tank sits on top of the back of the bowl, is popular because it is so compact and simple to install.
Before you begin gather the right equipment. You will need newspapers or old towels to set the toilet on after you remove it. A mistakenly dropped toilet could crack a ceramic tile floor. Also, make sure the new toilet fits inside the space occupied by the old toilet. Some newer models are available in longer and larger sizes than traditional designs and may not fit within the room.
Shut off the water supply to the toilet. After the water supply is disconnected, flush the toilet several times. Flushing repeatedly will remove the water from inside the tank and most of the water from the bowl. If there is any water left in the bowl, use a container to scoop it all out. If you leave any water in the old toilet it may leak out when you carry it through your home to dispose of it.
Unscrew the nuts that attach the toilet to the water supply line. Then, remove the caps that cover the bolts on the base of the toilet. Unscrew the nuts located under the caps.
Use a utility knife to score the between the bowl and the floor and then free the toilet by rocking it from side to side. Lift the toilet away onto some old towels or newspaper. Remove the wax gasket using a putty knife or similar tool. Block the drainpipe with a rag to prevent sewer gas escaping.
Excerpted from Do It Yourself Home Improvement
© Dorling Kindersley Limited 2009