Replacing a toilet is an easy job that requires basic tools and skills and can usually be accomplished in under an hour.
Step 11: Attach the new tank If they are not pre-installed, insert the rubber washers around the flush valve opening on the outside of the tank base and around the bolts that are inserted through the holes in the tank. Gently lower the tank into place and, while holding the tank, tighten the washers and nuts, alternating from one side to the other, until the tank is firmly seated on the rubber washers and level. Be careful not to over tighten these nuts; the rubber washers create a water-tight seal. Place the cover on the tank and attach the seat to the toilet by inserting the bolts into the holes at the back of the seat and through the bowl.
The rubber washer will form a watertight seal between the tank and bowl.
Make sure water to the toilet is completely turned off before proceeding. If the shut-off valve does not completely stop the water flow, temporarily turn off the water to the entire house. This information is offered only as a guideline. Always follow the instructions that came with your new toilet.