[header] How to replace a toilet [title] Get rid of all the water. [step] Turn off the water at the supply valve. Flush the toilet to remove most of the water (holding down the flusher for as long as possible). 
Remove the remaining water from the bowl by forcing it down with a plunger and mopping up the remaining water with a sponge. Then, remove the remaining water in the tank with the sponge as well.