Dripping sound from pipe

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Old 12-16-17, 04:07 PM
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Dripping sound from pipe

I have this dripping sound coming from the piping underneath my bathroom sink. It occurs regularly, approximately every 30 seconds, regardless of how recently the water was used. But it only seems to occur during cold weather outside (e.g. Below freezing).

I even tried turning the water supply off and draining all the pipes and the sound still occurs. Could this suggest something other than a leak? There is no evidence of water damage and this has been going on for a few months.

Here is a video link with the sound : https://m.youtube.com/watch?feature=...&v=PtpaTJieh84


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Old 12-16-17, 05:02 PM
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Welcome to the forums.

Video is good for visual reference but I didn't hear anything.
Is there anything above that room ? Bathroom ?
 
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Old 12-16-17, 05:48 PM
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no sound here, either.

Can you identify where the drip is coming from?
 
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Old 12-16-17, 06:10 PM
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There is a drip sound in that video, towards the end. All I can tell is that it is coming from the opened up area in the wall. This is on the second floor of the house. I can also hear this same sound coming from the wall from each floor directly beneath (the first floor and the basement). However, it is loudest on the top floor.
 
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Old 12-16-17, 06:27 PM
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Do you have a heating furnace in the attic ?
If not..... is there anything above that room or is it attic and then roof.
 
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Old 12-16-17, 08:19 PM
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Just the attic and roof above.
 
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Old 12-17-17, 05:25 AM
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You state it only occurs in cold so there is probably a vent stack close by and warm moist air is condensing and dripping inside the pipe.
 
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Old 12-17-17, 07:24 AM
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Some of you mentioned you don't hear the sound. Make sure you hit the 'tap to unmute' button on YouTube and then turn your volume all the way up.
 
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Old 12-17-17, 08:44 AM
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I can hear the drip at the end with speakers full volume. Like Marq said it's probably condensation.
I don't know of any way to stop it.
 
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Old 12-17-17, 01:05 PM
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Since there is nothing above that.... the pipe I see going up the wall is the vent line. It would have to be condensation as there is nothing else left to leak and cause water to drip.
 
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Old 12-17-17, 02:39 PM
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Thank you for the replies.
 
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