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Old 08-14-2016, 04:27 PM   #1
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Capping off one sink in bathroom


I have a standard two sink setup in our kids bathroom. I want to cap one of the sinks off and just have a single sink. What is involved in this? Thanks.
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Old 08-14-2016, 04:57 PM   #2
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Re: Capping off one sink in bathroom


And what happens when someone dumps water into the unused sink?
Why do you think you need to do this?
We can not see under your sink is plumbed from here without a picture.
Most often you can just shut the supply lines off under the sink and leave the drain alone.
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Old 08-14-2016, 06:10 PM   #3
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Re: Capping off one sink in bathroom


if you are going to change to a single sink top--all you need to do is screw a cap on the unwanted drain and ,perhaps 3/8" caps on the water shut offs.

If you are going to center the new sink---you may need to move one of the drains over so the p-trap will reach.
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Old 08-14-2016, 06:20 PM   #4
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Re: Capping off one sink in bathroom


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Originally Posted by oh'mike View Post
if you are going to change to a single sink top--all you need to do is screw a cap on the unwanted drain and ,perhaps 3/8" caps on the water shut offs.

If you are going to center the new sink---you may need to move one of the drains over so the p-trap will reach.

Thank you. This is what I am looking for. I am going to put a new vanity with a centered sink. So just a rubber cap for the second unused drain?
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Old 08-14-2016, 07:10 PM   #5
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Re: Capping off one sink in bathroom


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Originally Posted by tripower View Post
Thank you. This is what I am looking for. I am going to put a new vanity with a centered sink. So just a rubber cap for the second unused drain?
To center the new sink most likely to do it right you would need to reconfigure the existing drains under the sink AND possibly behind the wall.

Let's say behind the wall is a 2" vent drain more or less in the center, with a double sanitary tee fitting one runs left one runs right for your double sink stub outs, or perhaps your vent drain line is off to one side and two sanitary tees are stacked and you have a long and a short trap arm, the solution to each of these would be slightly different.

Are the two drain stub outs protruding the wall at different heights? That would kind of tell you one versus the other.

If you are going to open the wall to relocate the stubout horizontally...I would bite the bullet and open it a bit more to expose the sanitary tee fitting and either replace it, or cut it off with a short arm and solvent weld a cap over it.
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Old 08-14-2016, 07:25 PM   #6
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Re: Capping off one sink in bathroom


Post a picture under the sink and you will get a specific answer.
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Old 08-14-2016, 07:56 PM   #7
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Re: Capping off one sink in bathroom


There was no mention in your first post about replacing the whole top.
The more info the better the reply's.
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