The most fun thing you can do in your home is to replace the wax ring on a toilet. There are a number of reasons you may need to do this joyous task. You may want to paint or wallpaper behind the toilet, and need to remove it to access the wall behind. The toilet could break for whatever reason, and replacing the toilet means replacing the wax ring. Another reason to replace the wax ring on a toilet, the reason I’ve changed mine, is because we moved into this house, and every time we flush, a little bit of nasty liquid seeps out where the seal should be.