Toilet is running every few minutes. I defaulted to flapper, changed it, same issue.

So then I was like eh float assemblies are like 15 bucks let me change that too, changed that, same issue.

Finally, took the extra 5 minutes and did the flapper seat and the seal between the tank and the bowl, no dice.

The thing still runs for a few seconds every few minutes.

Not sure what the pipe that fills the bowl is called but the float isn’t filling higher than that opening, so it’s not that either.

Any advice on what to look for next? If this helps at all: when I shut the water off, and leave it for a day or two, I don’t really see much of the water leaving the tank if any at all.

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    The float closes a valve/seal at the fill tube. You changed/cleaned every other section, but the seal probably has a small leak/not sealing as new.
    – crip659
    Jan 26, 2023 at 1:21
  • How high is the water in the toilet? Compare the resting water level to the top of the overflow pipe. Should be an inch or two below. I am keenly interested in "exactly at the level of the overflow pipe". Jan 26, 2023 at 18:08

1 Answer 1


If the water level is not high enough to go down the overflow tube, it has to be seeping past the flapper. To verify that put some strong brewed coffee in the tank and wait. If the water in the bowl becomes light brown or yellow, you know the water in the tank is leaking past the flapper. Perhaps the seat needs cleaned and even the new part will not seal properly.

  • 1
    Food coloring has been known to stain some older bowls. Don't ask me how I know.
    – RMDman
    Jan 26, 2023 at 1:30
  • 1
    This was it. It was such a slow leak, but that worked perfectly with the food coloring. It had to have been just a drop every few minutes. Thanks guys
    – MZawg
    Jan 26, 2023 at 1:31
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    Don’t see any staining. But I’ll flush it all through quickly and avoid it lol. Thanks again y’all.
    – MZawg
    Jan 26, 2023 at 1:32
  • 1
    Most food coloring responds well to bleach, especially undiluted.
    – dandavis
    Jan 26, 2023 at 1:35
  • 1
    @manassehkatz-Moving 2 Codidact: I hate it when that happens, it always falls asleep again before dinner. Jan 26, 2023 at 3:12

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