Shower valves run hot only in the last few degrees of rotation

Discussion in 'Shower & Bathtub Forum & Blog' started by mlefebvre, Jan 20, 2011.

  1. mlefebvre

    mlefebvre New Member

    Joined:
    Jan 20, 2011
    Location:
    Raleigh, NC
    In my house, I have 6 shower/tub valves, all about 15 years old. Each valve, including the kitchen faucet, only gets hot water in the last few (3-5) degrees of handle rotation before full hot. Once hot water is running, moving the handle only a few degrees off full hot gets cold water. Any ideas anybody?

    My theory is there must be a big pressure differential between hot and cold, so that it takes calling for lots of hot water to overcome the cold. However, hot and cold water flow seems about the same.

    Thanks,

    Mark
     
  2. cacher_chick

    cacher_chick Test, Don't Guess!

    Joined:
    Jan 5, 2008
    Occupation:
    Test, Don't Guess!
    Location:
    Land of Cheese
    And you have a tankless water heater?
     
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  4. mlefebvre

    mlefebvre New Member

    Joined:
    Jan 20, 2011
    Location:
    Raleigh, NC
    No, conventional gas, set to about 120 or 130.
     
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