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Thread: Curious about sound...

  1. #1
    DIY Member jrseaberg's Avatar
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    Question Curious about sound...

    This is totally a non-important question; just curious...

    When I open only the hot water side of any of my faucets, the sound of the water exiting the faucet changes when the water gets warm (it is only a matter of seconds from first turning the faucet on until water gets warm, probably 20' of 1/2" copper from heater to faucet).

    If I had to describe it, it sounds like the "pitch" of the noise of running water changes.

    If this is happening, and I'm not imagining it, why/what is happening?

    Thanks!
    Jim
    Jim Seaberg
    Decatur, IL

    Old home lover, old home hater (when things don't go right!), .... Gee, kinda sounds like a country song!

  2. #2
    Plumber plumber1's Avatar
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    Default

    If there are bib washers in that faucet, try changing them..

  3. #3
    Moderator & Master Plumber hj's Avatar
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    Default water

    Hot water has a lower mass than cold water which changes the pitch, just as the sound of air coming from a pipe will change when the lighter natural gas arrives at the valve.

  4. #4
    Homeowner geniescience's Avatar
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    Default another change in noise

    i notice the same thing, as well as a second noise.

    Some kitchen faucets, when hot water reaches them, create a high pitch ("whistle") too, above the base noise. This overtone noise can be heard 30' away -- it carries farther than the base noise, which the person running the water can barely detect above the base noise.

    Running hot water can cause irritation at a distance.

    david

  5. #5
    DIY Member jrseaberg's Avatar
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    Default Thanks!

    I suspected it had to do with the mass/density of the water, but wasn't at all sure I was right.

    Thanks, all, for the responses.

    Jim S.
    Jim Seaberg
    Decatur, IL

    Old home lover, old home hater (when things don't go right!), .... Gee, kinda sounds like a country song!

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