The toilet flange is a circular pipe that holds the toilet unit to the floor which connects to the drainpipe. If your flange is loose or damaged, it can leak and erode the surrounding flooring. If you find water leaking at the base of the toilet or it starts to rock back and forth, these are the warnings to replace the flange of your toilet. Although replacing a flange is not an easy home repair, however, with the right tools and knowledge, it can be replaced.

First, you need to identify and purchase the specific type of Flange you have. You need to purchase a wax ring to secures the flange to the toilet base. Other things are needed – Wrench, Screwdriver and a putty knife.
Toilet flange bolts – Have new bolts on hand in case your existing parts are stripped or rusty.

Before starting the flange replacement your need to turning off the water supply to the toilet. The supply tap can be found on the wall behind your toilet unit. And drain all the water by flushing it frequently.

The next step is to remove the nuts from the mounting bolts that hold the tank. There should be one on each side of the tank, and there may also be one in the middle. Now lift the tank off the bowl and remove the nuts from the floor bolts with an adjustable wrench. The toilet flange will be sealed to the bottom of the bowl with a wax ring. Gently push the flange to break this seal. Lift the toilet bowl and lay it on its side nearby.

Now clear the wax ring from the base of the flange by scraping it away with a putty knife and pull out the mounting bolts and take off the toilet flange. Next, install a new wax ring in place of the previous one and secure the new toilet flange in place with new mounting bolts and screws. Now place the toilet unit on the top of the new flange, aligning the bolt holes in the base of the unit with the bolts in the flange. Lower it down and apply pressure to set the seal. Be careful not to move or tilt the toilet unit after setting the wax seal on the flange. This could break the seal, which may result in future leaks.

Secure the tank by tightening each tank bolt until the tank pulls down and comes in contact with the toilet unit.
Now reattach the water supply line and test the toilet for leaks by slowly turning on the water shutoff valve, allowing the tank to fill. Flush the toilet and keep an eye on the base to make sure there are no leaks.