Introduction

A failing fill valve can prevent a toilet tank from filling properly, or cause the toilet to fill continuously, wasting excessive amounts of water. Use this guide to replace the fill valve in a gravity flush toilet.

Tools

Parts

No parts required.

Lift the tank lid up and away from the toilet tank. Lift the tank lid up and away from the toilet tank. Lift the tank lid up and away from the toilet tank.
  • Lift the tank lid up and away from the toilet tank.

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Shut off the stop valve underneath the toilet by turning it clockwise until it becomes tight. The appearance of this valve may differ from toilet to toilet, but most operate the same.
  • Shut off the stop valve underneath the toilet by turning it clockwise until it becomes tight.

  • The appearance of this valve may differ from toilet to toilet, but most operate the same.

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Disconnect the fill valve's rubber refill tube from the top of the overflow tube. Disconnect the fill valve's rubber refill tube from the top of the overflow tube. Disconnect the fill valve's rubber refill tube from the top of the overflow tube.
  • Disconnect the fill valve's rubber refill tube from the top of the overflow tube.

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Push down the flush lever. Hold the lever down until water stops draining from the tank.
  • Push down the flush lever.

  • Hold the lever down until water stops draining from the tank.

  • A small amount of water will remain in the bottom of the tank.

  • If the flush lever or pull chain have become disconnected, lift up the toilet flapper to drain the tank.

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Use a sponge to soak up and remove any remaining water from the toilet tank. Periodically squeeze the excess water from the sponge. Periodically squeeze the excess water from the sponge.
  • Use a sponge to soak up and remove any remaining water from the toilet tank.

  • Periodically squeeze the excess water from the sponge.

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Place a bucket under the supply tube to catch any dripping water. Turn the coupling nut on the supply tube clockwise until it releases from the threaded shank on the bottom of the tank. Turn the coupling nut on the supply tube clockwise until it releases from the threaded shank on the bottom of the tank.
  • Place a bucket under the supply tube to catch any dripping water.

  • Turn the coupling nut on the supply tube clockwise until it releases from the threaded shank on the bottom of the tank.

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Using an adjustable wrench, turn the locknut on the threaded shank counter-clockwise until it becomes loose. Using an adjustable wrench, turn the locknut on the threaded shank counter-clockwise until it becomes loose.
  • Using an adjustable wrench, turn the locknut on the threaded shank counter-clockwise until it becomes loose.

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Turn the locknut counter-clockwise until it releases from the threaded shank. Turn the locknut counter-clockwise until it releases from the threaded shank. Turn the locknut counter-clockwise until it releases from the threaded shank.
  • Turn the locknut counter-clockwise until it releases from the threaded shank.

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Lift the entire fill valve out of the tank. When installing a new valve, be sure to adjust the float so that the water line  stops one inch below the overflow tube.
  • Lift the entire fill valve out of the tank.

  • When installing a new valve, be sure to adjust the float so that the water line stops one inch below the overflow tube.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

4 other people completed this guide.

Kristen Gismondi

Member since: 11/12/2014

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2 Comments

Great guide for removing the fill valve, but we're missing the steps for installing the new one. In the case of a Fluidmaster fill valve, you'll want to adjust the height to either match the one being replaced, or the more time-consuming (but not hard) method of marking the fill line of water on the tank, adjusting the fill valve to be just above that, then testing. Or ... is that another guide? For the present, I'd call this "removal." Perhaps we can create a new one for "installing a new fill valve." Ping me for assistance if needed.

David Spalding - Reply

Hi David,

Thanks for checking out our guide! By default, all iFixit replacement guides conclude with "To reassemble your device, follow these instructions in reverse order." Our guide is intended to be a basic procedure that works for most fill valves. This particular fill valve is a Fluidmaster, and we do have an adjustment guide currently in the works. We'll also be updating our existing toilet guides, so make sure to check back soon.

We hope this clears everything up!

Kristen Gismondi -

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