eXp Realty, LLC

DIY: Replace the Mechanism in Your Toilet Tank

by Kyung Kim 05/14/2020

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

    Kyung Kim

    Hi, I'm Kyung Kim. I immigrated from South Korea to the United States in 1968 when I was 7 years old. I have seen my mom struggle with the English language and work hard to raise her four kids by herself. Still to this day, I don't know how she pulled it off, but she bought her first home in 1979 for $70,000 and because of that decision, she was able to live without worrying about her financial future. I want that for everyone, to feel the pride of home ownership and to build their financial wealth using real estate as part of their financial portfolio. I feel so blessed to play a small role in helping others reach this goal.

    I live in Beaverton with my husband, Richard. My mom, who lived with us for several years, passed away in our home in February 2022. Her first home purchase in 1979 made it possible for her to live to the very end, without worrying about her finances. As of August 2022 with a little downpayment assistance, our four children own their own homes. Being in real estate, I quickly realized that if they didn't buy now, they may be priced out of the market in the future. Whether that would have been the case, we will never know, but what we do know is that they are all realizing some good, healthy appreciation in their home values.

    As passionate as I am about people owning their homes, I'm also passionate about giving back to our community. I support Compassion First, a non-profit organization that provides aftercare for sex trafficked girls in Indonesia. My husband and I also feel called to financially support social injustice organizations.  

    I'd love to assist you. Whether you're in the research phase at the beginning of your real estate search or you know exactly what you're looking for, you'll benefit from having a real estate professional by your side. I'd be honored to put my real estate experience to work for you.