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Old 06-05-2020, 07:13 PM   #1
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Default What is this hole and why is it leaking?

Hi all,

I have just installed a new faucet and drain pipe under the bathroom sink. It seems to be ok, except that I found this little hole under the sink and water is leaking through it. When I activate the drain stopper (or whatever it's called - sorry for the terminology, so the water stops in the sink) then it is not leaking. But as soon as I let the water flow down, the water is coming out of this little hole.

Anyone knows what this hole is, why does the water coming out of there? What should I do to stop the water leak through this hole?
(see attached image with the red circle)

Thank you!

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Old 06-05-2020, 07:25 PM   #2
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Have you tried the putty trick?
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Old 06-05-2020, 07:26 PM   #3
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Nope, but as you can see it's clean. There was no putty there before with the old assembly.
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Old 06-05-2020, 08:38 PM   #4
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This site is for professional plumbers, drain cleaning businesses.

This site is not for DIY individuals or consumers.

An "Intro" is requested for all new members. If you had took the time to read the rules you would have observed this.

If you are in the profession please post an intro as required. If not their is a "sister" site for DIY.

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Old 06-05-2020, 09:02 PM   #5
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just squeeze a tube of toothpaste in the hole, it will harden and stop the leak...
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Old 06-05-2020, 09:05 PM   #6
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GO TO https://www.diychatroom.com/
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Old 06-05-2020, 09:27 PM   #7
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nice gypsy wagon. did you leave the axles on it?
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Old 06-05-2020, 09:40 PM   #8
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It's normal, it's a vent for the overflow. It's supposed to be tied in the vent stack in the wall. Get some tubing and tap it with a needle valve.
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Old 06-05-2020, 10:33 PM   #9
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Quote:
Originally Posted by pentool View Post
Anyone knows what this hole is, why does the water coming out of there? What should I do to stop the water leak through this hole?

Just stick your johnson in there to plug it, I'm sure it will fit just right!




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Old 06-05-2020, 10:41 PM   #10
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Quote:
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It's normal, it's a vent for the overflow. It's supposed to be tied in the vent stack in the wall. Get some tubing and tap it with a needle valve.
Well, the old one had a metallic piping and had a wider rubber seal which apparently was covering it up. I put in some putty. If that doesn't stop it, then I might seal it around with some extra silicone. If that doesn't do it, then I might just call a "real" plumber.
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