• In this video, This Old House plumbing and heating contractor Richard Trethewey explains how to fix a running toilet.


    1 Turn off the water at toilet's shut-off valve.
    2 Remove the rubber flapper from flush valve inside the tank.
    3 Inspect flapper for damage or discoloration.
    4 Check location of float on chain; adjust float to height of water level.
    5 If adjusting float doesn't solve problem, or if there is no float, install a new flapper.
    6 Flush toilet and check to ensure new flapper creates watertight seal with flush valve.
    • Difficulty: Easy
      So easy, in fact, you don't even need any tools.

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      1. New toilet flapper