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jeffgator 01-26-2007 09:40 PM

Roughed in basement vent question
Hi! I am working on my basement bathroom. It was roughed in when built, but I have a couple questions about getting it all on-line.

It is a full bath so I have separate drain pipes out of the slab for the tub, toilet and sink. I believe that two of those pipes connect under the slab because from what I recall there are only two pipes leading into the 30 or 40 gallon basin for the sewage pump. It is about 15 feet from the furthest fixture to the drum. I have a vent roughed in near the basin, but not any vents in the bathroom itself.

How do I go about connecting all this to the vent system?
1. Do I use studder (sp?) vents for the tub, toilet, and sink and basin to the vent?:huh:
2. Do I have to tie the fixtures into the vent from the floor above - please say no :(
3. Do I just connect the basin to the vent and not have vents from the fixtures themselves? :thumbup:

I did some research about 2 years ago on this subject when I was all gung-ho to get'r'done, but reality set in and I wasn't able to move on it yet, and now I have forgotten.

Any help is much appreciated.


Ron The Plumber 01-27-2007 12:34 AM

Check your code to see it you can use studor vents, if you can't then you will have to vent up up up.

jeffgator 01-27-2007 09:02 AM

Thanks for the quick reply Ron.

Based on what I found on the manufacturers website, I think I'm ok in my area, but I plan to double check the code locally. (

Also, just so I'm clear - I will be installing a separate studor vent to each appliance(tub, sink, toilet), and then vent the basin to the stubbed in vent pipe.

Ron The Plumber 01-27-2007 09:03 AM

If allowed then yes. One for each fixture.

jeffgator 01-27-2007 10:07 AM

Thanks - I seem to have more questions as I peel off the layers on this project.

I suspect that the rough-in job wet-vented the toilet to the tub drain, but I'm not certain. I clearly have the rough-in for the toilet, but then right back in the wall behind the toilet I have another pipe out of the floor which I had assumed was for the sink (after running the drain pipe through the wall a few feet for the fixture). But now I suspect that it might be for both the sink and to vent the toilet.

Is there an easy way to determine if they wet-vented the toilet?

Maybe I'll sketch this out so you can see what I'm looking at. I'm sure that I'm thinking this through too much, but I'd rather spend the time up front and get it right than have to tear up the floor and redo the whole thing.


Ron The Plumber 01-27-2007 11:48 AM

There is no easy way to tell below the slab, a sketch would be of some help.

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