How to Replace the Mechanism in Your Toilet Tank

by Tony Carter, Realtor® 10/11/2020

Photo by House Method on Unsplash

Some home maintenance projects definitely require a professional. But given just how fast homeownership costs can add up, it's nice to know that other home projects are DIY for the average person. 

Replacing your toilet fill valve and the flapper is one such project. 

The toilet is one of the few items in our homes that hasn't changed much in the past couple hundred years. What does that mean for you? 

For the most part, basic mechanical principles make it work. And the great news is, if the toilet looks okay cosmetically, then replacing these mechanisms basically gives you a toilet that will function as if brand new. 

Let's get started.

What you'll need

  • An XL bucket that can hold about three to five gallons. It needs to fit under the back of your toilet.
  • Crescent adjustable wrenches
  • Rags
  • Replacement parts (fill valve, flapper and/or gasket). *Pro tip* Just look inside your toilet to see what kind of valve it uses. 

    Aside from the replacement parts, we'll bet you have most of these things at home. Replace all or some of these parts using this guide. It's up to you.

    Step one: Empty the tank

    Start by turning off the water using the knob behind your toilet. This keeps the tank from re-filling as you empty it.

    Flush the toilet. This will empty the tank partway. Don't miss this step or there will be way more water in the tank than the bucket can hold.

    Now, place your bucket behind the toilet, and carefully remove the hose from the tank but not the wall. Direct the water into the bucket.

    *Pro tip* If you have a larger than average tank, then you might have more water in it than you can fit into the bucket. Don't freak out it if it fills fast. Just place your thumb over the hole to stop the flow. Empty the bucket into one of the following:

  • Shower
  • Bath
  • Sink
  • Toilet bowl
  • Step two: remove the flapper & gasket

    The flapper simply sits on top of the hole in the bottom of the tank. Simply dislodge the hinge of the flapper and pull it out of the tank.

    Now, remove the gasket under the tank. Just unscrew the tank from the bowl. Lift the bowl carefully and set it on the floor. Remove the gasket by hand. You can then remove the valve by unscrewing it.

    *Pro tip*:  If the nut and bolt are on extra tight, you'll need one wrench to hold the nut under the tank while you unscrew from the inside. 

    Step three: replace the gasket & flapper

    Simply screw the new gasket on. Be careful not to over-tighten and strip the grooves or you'll have a more significant repair job on your hands.

    Screw the tank back onto the bowl, and then install your new valve with the lock nut, which will be under the tank. Place the flexible tube into the tanks overflow pipe.

    Now, snap the new flapper in place and that's it. Use the rags to clean up any water that spilled. Fill up your tank and go. 

    For more easy DIY projects, follow our blog.

    About the Author
    Author

    Tony Carter, Realtor®

    My wife, Cindy and I, moved to Florida 9 years ago from Wisconsin, where we were born and raised. I proudly served in the United States Air Force and was stationed overseas and in The Gulf War. Became a member of The American Legion and a lifetime member of Veterans of Foreign Wars (VFW). After, the Military, I got into the retail business for the last 25 years. During my last position, in the retail. I was second-in-charge of a 125 million dollar a year business. Thatis where I developed my passion for customer service and taking care of the customer. With that passion, I became a full-time licensed Realtor in the state of Florida. I understand that real estate is not just a transaction but an important personal decision, a decision that may need guidance. I am here to answer any questions and guide you and your family through the process. Whether buying for the first time. Purchasing a condo, single-family home, investment property or a time-share on the beach. I am the exclusive Realtor for the Mariner Beach Club in St Pete Beach, Florida and for the Island Gulf Resort in Madeira Beach, Florida. Please feel free to contact me with your real estate needs directly at cell 262-894-8135 or via e-mail at [email protected] or website; www.TonyCarterRealEstate.com. Timeshare on St. Pete Beach, Florida. www.TonyCarterRealtor.com. Video of the Mariner Beach Club, St. Pete Beach, Florida. www.imagemaker360.com/141537. Website to the timeshare at Madeira Beach, Florida. www.IslandGulfResortFlorida.com