How to install a toilet

Instructions how to install a toilet in 12 easy steps. Download the pdf for a step by step guide of your project.

Step 1

The closet bend and toilet floor flange must be roughed in first. When replacing a toilet, you will need to scrape off the old wax gasket. A putty knife works well for this. Remove the old bolts from the floor flange and scrape the flange clean to prevent leaks at the base of the new bowl. Replace the old floor flange with a new one, If the old flange is cracked or broken.

Step 2

Position the floor flange so that the underside of the flange is at the level of the finished floor. (It is always best to install the finished floor so that it runs underneath the toilet.) You may need to use a piece of finished flooring material if the floor has not yet been installed. Next you can finish tightening the screws that hold the floor flange to the floor. Put a small level on the flange while tightening to make sure it is level.

Step 3

Coat the new floor bolts with plumber's putty and insert them through the flange, adjusting the bolts so they line up with the center of the drainpipe.

Step 4

Turn the new toilet bowl upside down and position the new wax gasket over the toilet horn on the bottom of the bowl.

Step 5

Apply plumber's putty around the entire bottom edge of the bowl.

Step 6

Using the bolts as guides, lower the bowl into place over the flange. Press down firmly while giving a slight twist. It is important that you feel the toilet being pushed into the wax ring. If you do not feel this, the flange is set too low and you will not get a good wax seal between the flange and the horn (waste outlet). Please note, if the wax ring is cold, it will not seat properly. You will have to warm it in the sun for awhile until it is pliable.

Step 7

Use a level to level the bowl, adding shims where necessary. Make sure the toilet is squarely aligned with the wall. Then tighten the nuts and washers onto the bolts by hand.

Step 8

Place the rubber tank cushion (if one is needed) into position on the rear of the bowl and fit the rubber gasket onto the flush valve opening on the bottom of the tank.

Step 9

Position the tank over the bowl; then tighten the nuts and washers onto the mounting bolts.

Step 10

Tighten the hold-down bolts at the base of the bowl with an adjustable wrench. Use your level to assure the bowl is still level.

Step 11

Fill the decorative caps with plumber's putty and place them over the bolt ends. Seal the base of the toilet bowl with plumber's putty or silicone caulk.

Step 12

Cut the end of your supply line stub out and attach a shut off valve. Then, connect the shutoff valve to the flexible tubing and connect the tubing to the bottom of the tank, where you will find a supply stub out.