Hot Water Singing...

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by thinkly, Oct 15, 2009.

  1. thinkly

    thinkly New Member

    Joined:
    May 21, 2008
    Location:
    Kansas
    We moved into our new home a few months ago. Shortly after moving in i noticed that whenever any of the showers (3 of them) are turned on there is a singing noise throughout the house.

    I wouldn't describe it as a whistle because it isn't that high pitched, but rather like a high pitched hum or "singing." It's not REAL loud but is audible everywhere if you listen for it.

    What can this be?
     
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    Do you have the same model showerhead in each one? Maybe the restrictor is singing...
     
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  4. Cass

    Cass Plumber

    Joined:
    Nov 12, 2005
    Location:
    Ohio
    It may be a bad pressure reducing valve if you have one...I have also seen the check valve that some meters have do it...
     
  5. hj

    hj Moderator & Master Plumber Staff Member

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

    It may be the "heat traps" in the water heater inlet or outlet lines. Bad water softeners and defective pressure reducing valves can also cause the noise.
     
  6. Runs with bison

    Runs with bison Member

    Joined:
    Aug 23, 2009
    Location:
    Midwest
    I've seen this exact thing recently, althought intermittently. The pressure compensators of some designs are more sensitive to this. It might be worth experimenting with another showerhead.

    Is it only doing it when the shower runs, not faucets?
     
  7. nhmaster

    nhmaster Master Plumber

    Joined:
    Jul 30, 2008
    Occupation:
    Tech. Instructor
    Location:
    S. Maine
    What key is it in? B flat works for me :D
     
  8. Cass

    Cass Plumber

    Joined:
    Nov 12, 2005
    Location:
    Ohio
    F sharp....
     
  9. thinkly

    thinkly New Member

    Joined:
    May 21, 2008
    Location:
    Kansas
    Just happens with the showers. Oddly enough, we replaced both two of the three shower heads after moving in for aesthetic reasons. Still it sings. This is a fairly new house (only 8 yrs old), and will have to do more digging to find the answer.

    No other hot water sources cause this, so has to have something to do with showers, i.e. restriction of water flow.
     
  10. nhmaster

    nhmaster Master Plumber

    Joined:
    Jul 30, 2008
    Occupation:
    Tech. Instructor
    Location:
    S. Maine
    pull the water saver disc out of the shower head.
     
  11. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    And run out of hot water in a few minutes...

    Are these tub/showers? The divertor in the tub spout can often make some nasty noises. Do they sing when filling the tub as well? Or only when diverted to the shower?
     
    Last edited: Oct 17, 2009
  12. Cass

    Cass Plumber

    Joined:
    Nov 12, 2005
    Location:
    Ohio
    Pulling the disk will cause you to run out of HW sooner but will help you figure out if the disk is the source of the noise...
     
  13. nhmaster

    nhmaster Master Plumber

    Joined:
    Jul 30, 2008
    Occupation:
    Tech. Instructor
    Location:
    S. Maine
    I have no water savers in any of my faucets and I don't run out of hot water. Then again I have a 60 gallon indirect piped to a Buderus 125
     
  14. Runs with bison

    Runs with bison Member

    Joined:
    Aug 23, 2009
    Location:
    Midwest
    And as a result you likely also spend twice as much on hot water (plus water and sewer if it is not a well) as the normal customer. Not very good advice other than as a troubleshooting aid.
     
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