I have a ceiling leak (brown wet spot) that is directly above a toilet on the floor above. There is no apparent leak when just inspecting the toilet including a test flush. I stopped using this toilet and the stain has still gotten wetter/darker within under 20 hours. Any suggestions are what are the most likely causes of this?

  • Sounds like a water line leak? – ThreePhaseEel Oct 3 '17 at 0:20
  • Does the toilet sit solidly on the floor, or can it rock sideways when you put a bit of pressure on it? I'm betting wax ring failure... – Aloysius Defenestrate Oct 3 '17 at 0:26
  • Although you've stopped using the toilet water can still be leaking past the flapper. If you have a crack/leak in the drain pipe then the ceiling will continue to get wet. I would suggest you turn off the water supply valve to the toilet and see if the leak continues. If the leak continues then the problem is a water line leak as indicated above. – Platinum Goose Oct 3 '17 at 16:47

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