How to Replace Your Toilet Tank Gasket

  • 2-3 hours
  • Beginner
  • 15-30
What You'll Need
Toilet tank gasket kit
Crescent wrench
Rubbing alcohol

Replacing your toilet tank gasket is an easy task to do if you are finding leaks throughout your toilet. Below you can learn how to complete this project with the right supplies and directions.

Step 1 - Shut Water Off

Shut the water off at the shut off valve. It is usually located at the side of your toilet, towards the back. It is kind of hidden away so that it isn't an eye sore. Then flush the toilet to empty any remaining water. You then can use a plunger to remove any water from the bowl itself as well. Use a crescent wrench to then disconnect the water supply line.

Step 2 - Remove Lid

Remove the lid of the tank. Use a sponge to soak any remaining and excess water that may still be left in the toilet tank. Doing so will create a more comfortable working space, as well as preventing any water from seeping into your new connections.

Step 3 - Loosen and Remove

Now that you are viewing the inside of the tank, you should be able to locate the bolts that are securing the tank into place. Use the crescent wrench and attach it to the bolts from underneath the tank while you loosen the bolts from the top.

Now you can easily, and very very carefully remove your tank and set down beside you. You will want to set it on some sort of padding to prevent any damage to it. Make sure that the fitting is facing up when you lay the tank down.

Step 4 - Rubbing Alcohol

It's time to do some cleaning with your rubbing alcohol and your rag. Take the old gasket and remove it along with and residue that is present. Use your alcohol and rag for the best results.

Step 5 - Inserting the New

Once your tank is clean, you can place your new gasket over the fitting. Insert the bolts through the top of the tank. Use washers on the inside and outside of the bolts.

Step 6 - Back in Place

Since you have successfully replaced the gasket and washers, it is time to get your tank back to the place it used to be. Being very careful to not damage the tank, lift the tank back into place and secure it.

Add the last set of washers to the bottom bolts. The metal washer goes under the rubber. Then simply secure and tighten the bolts. Now all there is left to do is connect your water supply line, restore the water, and test it.