Fixing a Leaking Toto (Korky 528) Toilet Fill Valve for Less than $6

I heard a slight, subtle hissing noise from the toilet in the middle of the night. It was coming from the fill side of the tank and was not caused by a leaking flapper. Upon examination, the cap assembly for the toilet fill valve had failed. As seen in the first video*, water continues to flow when I cover the area where the float seals the valve cap.




The fix was quick and inexpensive because I only replaced the cap assembly. The big box stores would like to sell you the entire fill valve for about $27 rather than sell the replacement cap for about $5. Replacing the whole fill valve is a lot more work. You must drain the tank, disconnect the supply line, remove and replace the fill valve, reconnect the supply line, and check for leaks. In addition, you will need tools.

I was able to stop the leaking toilet for under $6. I found the part on Amazon for about $7, but upon further review, I could pick it up from a local True Value for about $5. The entire job took about two minutes to close the supply valve; remove the fill tube, valve cover, float arm, and valve cap; and reinstall. No tools were needed.

*If the video is not working, go to Instagram to see my reel. I'm @LearnMakeFixRun

Have you completed any repairs by replacing the failed component rather than the entire assembly? If so, what did you repair? I would like to read about it in the comments below.

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