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Old 07-15-2008, 11:53 AM   #16
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drill hole in new sink


Ahhh! Literal Girl now understands! Thank you. I have one of those brains that can't move forward until the question at hand is answered. So, on to the clog.

Thanks, all of you -- you've been a huge help. I'll post when I've solved the problem.

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Old 12-29-2012, 10:16 AM   #17
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drill hole in new sink


This is an old thread but it the same exact problem I have. My bathroom sink does no drain well and I see air bubbles trapped under the drain plug while the water is trying to drain. My trap is clean so I know it is not a drain problem. If I unscrew the drain plug the water drains fine. I have the drain plug adjusted to go as high as possible. I see 2 ways to fix this problem.

First of all if I had a longer sink plug shaft I could raise the plug which would allow the water to drain correctly. But it can not be too big or the drain would not close. This seems like the less risky approach

Secondly I thought of drilling an overflow hole to let air in. I also would like to have an overflow hole to prevent accidents. It is a rental property and I do not know how careful the renters are. My sink appears double walled since I do see a protrusion where the overflow hole usually goes. The drain pipe does have holes in it like the one shown in the previous reply in this thread. I think the hole would benefit the sink drainage and provide overflow relief. How would I go about drilling without destroying the sink? I figure I need a masonry bit and would start with a small hole then work up to a 1/4" hole. But I am not sure how to finish off the hole. Would it be rough? Do I have to sand it or paint it to smooth it off? Is there a high probability the sink will crack and I will ruin it?

Thanks for any help.
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Old 12-29-2012, 04:15 PM   #18
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drill hole in new sink


You have poor venting and a block. It is possible that the sinks drain into a different line than the shower and toilet. Or the other fixtures work differently in regards to how they drain. You stated that the sinks were new. New means they were just installed, this appears not to be the case. I had this "stuff" in my pipes that looked like something off the bottom of the ocean. I had to use a pipe and a sledge hammer to break through it. It would grow back in about a year. It would even grow out of the sink drain. You will be happy if you have a plumber check your drains and vents with a camera and snake. Or just keep a glass full of soda straws handy on the top of the sink...
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Old 12-30-2012, 05:22 PM   #19
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drill hole in new sink


I took apart my drain plug and saw rust corrosion build up on the pivot rod. I changed the pivot rod and now the drain plug can raise higher to let the sink drain better. I still may drill an overflow hole in the sink to prevent accidents. I will check with the manufacturer on proper technique. But at least my sink drains better now.

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