Hissing noise coming from the Fill Valve

Discussion in 'Toilet Forum discussions' started by maximus, Jul 10, 2007.

  1. maximus

    maximus New Member

    Apr 9, 2007
    I heard hissing sound coming from inside of my toilet tank. I lifted the tank cover and noticed that the noise was coming from the top of the fill valve. I carefully removed the top (the cap) of the fill valve and saw that a small amount of water was squirting out. Does this mean that the fill valve needs to be replaced?
  2. Peanut9199

    Peanut9199 Customer Service Manager Plumbing Wholesale

    Apr 23, 2007
    Customer Service Manager Plumbing Wholesale
    Ontario, Canada
    Depends on which fill valve you have.
    If it's the old style you can replace only the diapragm cap see this thread.
    if it's the new style that has the white adjustment screw on top, you would have to replace the entire valve.
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  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    It could just be doing its job...if the flapper valve is leaking, the fill valve could be open to keep the water level up. Probably dirt in the valve seal, though.
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