Symptom: There is water on the floor around the base of my toilet or water leaks from under the base of my toilet when I flush.
Usually this happens when the wax ring looses it's seal. Replacing the wax ring under the toilet bowl should repair this problem.
The first step in making this repair is to turn off the water source and remove all the water from your toilet tank and bowl. A good maintenance tip is to have a stop valve installed before the water supply line to the toilet tank. This is very common in most residences. If there is no stop valve the water will have to be turned off outside to make this repair. Many times an inline shut off valve will be installed where the water enters the home. The water can be turned off here, or at the street where the water meter is installed. A good maintenance procedure is to install a shut off valve right outside the house where the water enters from the street. It is also very convenient for making other plumbing repairs.
Next, once all the water is out of the toilet tank and bowl and the water is turned off, disconnect the water supply line to the toilet tank. Next Remove the nuts from the bolts that hold the toilet bowl to the floor so you can lift the bowl off the floor and away from the toilet flange(top of the sewer pipe). Inspect the flange for deterioration or damage. Cast iron pipe flanges rust over time and may need to be repaired or replaced. There are several options for repairing a cast iron flange. Putting a new steel ring over the top of the cast iron flange, chipping off the rusted flange and replacing with a new cast iron flange, or inserting a PVC (plastic) flange with an expansion joint are some of the options for repairing a damaged or deteriorated cast iron flange. Repair techniques for PVC flanges include using a "half moon" metal part, or a PVC spacer. All these parts can be purchased at your local home improvement store.
The last step, once you have inspected and/or repaired the toilet flange is to install the wax ring that you purchased at the local home improvement store. The wax ring is applied to the bottom of the toilet bowl. Set the bolts in the toilet flange and carefully set the toilet bowl over the bolts onto the wax ring. Install the nuts onto the bolts being careful not to over tighten. Reattach the water supply line and open the valve. Check for leaks. Once the tank is full, do a test flush to be sure you have a good seal at the flange. Your repair is complete!