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Old 10-15-2015, 05:11 PM   #1
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Can two sinks share the same drain/vent stack?


I'm in the process of starting my basement refinishing project and have run into an issue. I've got a stud wall that is already roughed in for the bath room. I'd like to add a wetbar/sink to the other side of the wall. The problem is there is only one drain pipe. Can I somehow T the drain so I can have sinks on either side of the wall? Do I need to vent the sinks separately? I'll try to attach a picture so you guys can see what I'm working with. And FYI, my plumbing knowledge is very little.
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Old 10-15-2015, 05:45 PM   #2
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We need to know what state you reside in to know what code applies.
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Old 10-15-2015, 06:55 PM   #3
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If UPC, You can add a second tee for a bar sink to the vertical drain.
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Old 10-15-2015, 06:58 PM   #4
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As I understand it, the Tee for that vent needs to be at least 6" above the fixture.
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Old 10-15-2015, 07:01 PM   #5
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I'm in Minnesota.
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Old 10-15-2015, 07:03 PM   #6
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By 6 inches above the fixture, are you talking about the horizontal branch already in place?
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Old 10-15-2015, 08:19 PM   #7
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Eplumber already answered you. Refer to his post.
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Old 10-15-2015, 08:40 PM   #8
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What is UPC?
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Old 10-15-2015, 08:51 PM   #9
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Quote:
Originally Posted by Walleye vision View Post
What is UPC?
Uniform Plumbing Code

Minnesota has adopted it's own code according to Google
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Old 10-15-2015, 11:34 PM   #10
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Ok, I've included another pic and drawn what I think you mean (See the red in the first picture). Is this correct?

I've also added a second picture of something that I was thinking of earlier that makes sense to me, but may make you guys laugh. You never learn unless you ask right!

Thanks for your help
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Old 10-15-2015, 11:35 PM   #11
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Here's the second picture.
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Old 10-16-2015, 08:26 AM   #12
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1st picture is good- 2nd is bad. They must tee off the vertical pipe
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Old 10-16-2015, 07:18 PM   #13
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The bar sink is usually the higher sink. PS. For those reading this is not legal under IPC due to pipe in the vertical being undersized. And you can not tie a bar sink into an existing wet vent for a bath room.
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