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    Mmooney's Avatar
    Mmooney Posts: 4, Reputation: 1
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    #1

    Nov 30, 2015, 09:25 AM
    Whistling Plumbing Vent
    There is a whistling sound coming from the plumbing stack on the roof. It's not the wind. Any ideas on what is causing it?
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
    		  
    #2

    Nov 30, 2015, 10:13 AM
    Is that whistle continuous or only when somebody uses bathroom?

    Back to you

    Milo
    Mmooney's Avatar
    Mmooney Posts: 4, Reputation: 1
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    #3

    Nov 30, 2015, 10:18 AM
    It is constant.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #4

    Nov 30, 2015, 02:12 PM
    When you put your ear to the vent, you hear a whistle, yes? Turn off the toilets at the stops and listen for the sound. Still hear it? There is no real reason for the sound except wind or a leak being transmitted to the vent. Have any outside faucets turned on? Equipped with vacuum breakers? Mine make a whistling sound when left open to the garden hose without even running water through them when someone uses the house water.
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
    		  
    #5

    Nov 30, 2015, 04:39 PM
    Whistle is produced by wind passing through some kind of obstruction. In your case, I would look into the vent on top of the roof to see if it is clear of debris. While there, you can take garden house, put it inside the vent, and run water for couple of minutes to flush down what ever is inside. Also, you can put nylon sock over the vent to prevent wind from blowing inside the vent. Go back to your house and see if the whistle stopped.

    Other than that, and as indicated in above post, sound may alos be generated by some device attached to your plumbing ( angle stop, garden hose valve, sprinkler valve, toilet valve, etc ). You have to investigate and eliminate each device one by one.

    Back to you

    Milo
    Mmooney's Avatar
    Mmooney Posts: 4, Reputation: 1
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    #6

    Nov 30, 2015, 04:43 PM
    Thank you guys. I have been doing some exploring and I think something is obstructing the vent itself... It had no cap on it. I couldn't reach anything before I lost light so I'll try again another day.

    Thanks again!
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #7

    Nov 30, 2015, 08:03 PM
    Even a slight breeze can cause this Definition Bernoulli Principle
    Its a it like blowing across the top of a pop bottle.
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #8

    Nov 30, 2015, 08:55 PM
    Do you have a heating / ac system in the attic?
    Mmooney's Avatar
    Mmooney Posts: 4, Reputation: 1
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    #9

    Nov 30, 2015, 11:05 PM
    Quote Originally Posted by hkstroud View Post
    Do you have a heating / ac system in the attic?
    No they are in the basement.
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
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    #10

    Dec 1, 2015, 04:58 AM
    Does condensate tube drain to house plumbing? Is furnace running when you hear whistling?
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