Do I need a new vent for my shower drain?


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Old 08-07-22, 04:49 AM
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Do I need a new vent for my shower drain?

Putting in a new shower stall, toilet and sink already vented with 2 inch pipe. Can I run a 2 inch shower drain 8 feet over to my sink drain line and connect it? Will a 2 inch vent pipe be able to vent all 3 bathroom fixtures? Below I found a picture the way my bathroom is vented now, only mine is in reversed, toilet in the corner and sink in the center. I can run another vent to the shower drain if needed as shown in the pic below on the right...

 
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Old 08-07-22, 09:10 AM
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In your "after" picture you have new vent and old vent.
That should be new vent and existing vent... correct ?

I'm not the pro but I don't see a problem with your idea.
 
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Old 08-07-22, 09:43 AM
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Yes my mistake, that old vent is my existing vent. I was just going to tie my shower drain into my sink drain line but wasn't sure if that existing vent was to far away to handle all 3 fixtures, I would about 6-8 feet away. I figured maybe by running a separate shower drain and connecting the new vent pipe to the existing one if that would give me a little more venting volume.
 
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Old 08-07-22, 02:16 PM
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As long as it's above the wet it should be ok.

Your mixing drain and vent in your description.
The vent isn't an issue. Not sure where the drain is tied in.
 
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Old 08-07-22, 04:20 PM
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The vent is fine.

But the vent should be tied into the shower drain AFTER the trap.
Shower Drain > Trap > Wye to vent > to main drain.

Also, typically the toilet doesn't have its own vent, it can use the vanity vent. But if that's how it's already plumbed, that's certainly fine.
 
 

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