Bathroom sink drain hole not perfectly round: Will it leak?

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Old 06-29-19, 02:41 PM
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Bathroom sink drain hole not perfectly round: Will it leak?

Hi,

I just installed a nice bathroom sink vanity box (solid wood) with a traditional undermount sink. But there is a small defect that worries me--which prompted me to ask here. The hole in the porcelain bowl was quite a bit elongated in one direction which causes a visible gap when I put the drain assembly on it. Please see attached picture.

After talking to some people, I decided to go ahead to install the drain assembly and everything. I used plumber's putty underneath the metal lip, but then use clear silicone to close the big gap on the side that is not perfectly round. Looks it is like working, but I am not sure how long this will last.

QUESTION: Any suggestion how to address this problem? Or should I pursue the manufacturer to send me a new sink bowl to replace this one?

Sink hole:



Hole with old drain assembly on it (not installed):



Hole with new drain assembly (this is the one I really installed):

 
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07-08-19, 03:40 PM
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Never used silicone to fix an obvious manufacturer defect. Replace the sink.

To be honest, the seal is done under the sink with the donut gasket. It will not leak, it also will not hold water if you fill the bowl up and pull the stopper shut, it will slowly drain. Silicone, has no place in a drain install.
 
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Old 06-29-19, 02:53 PM
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used plumber's putty underneath the metal lip
Exactly what I would have done!
 
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Old 07-08-19, 02:34 PM
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Any thought on the "silicone patch" to close the big gap? It seems to hold up for now, but I suspect in a few years I may have to reapply that.
 
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Old 07-08-19, 03:40 PM
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Never used silicone to fix an obvious manufacturer defect. Replace the sink.

To be honest, the seal is done under the sink with the donut gasket. It will not leak, it also will not hold water if you fill the bowl up and pull the stopper shut, it will slowly drain. Silicone, has no place in a drain install.
 
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