Shower goes cold...

Discussion in 'Shower & Bathtub Forum & Blog' started by steveg91, Jul 7, 2008.

  1. steveg91

    steveg91 New Member

    Joined:
    Aug 14, 2006
    Hey folks, While taking a shower, it'll go cold periodically, then back to regular, then cold, etc. We have a large water heater. THe shower valve is single handle, could it be the valve??

    Thanks,
    Steve
     
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    You could have some crud in the line that is moving back and forth with pressure changes, or tumbling, changing the amount of hot that gets to the valve. Is the pressure changing when this happens, or only the temp?
     
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    cold

    IT could be any number of things but can only be diagnosed by someone at the house checking when and why it happens.
     
  5. steveg91

    steveg91 New Member

    Joined:
    Aug 14, 2006
    Hi Jim, The temperature is the only thing that changes.
     
  6. Redwood

    Redwood Master Plumber

    Joined:
    Dec 15, 2007
    Occupation:
    Service Plumber
    Location:
    Connecticut
    You may have an older non pressure balanced mixer. If someone else in the house uses water the temperature will fluctuate.
    If you do have a pressure balanced mixer the balancing valve may be stuck.

    What do you have for a mixer valve?
     
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