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Where does my bathtub vent go ??? Pic included

2971 Views 5 Replies 2 Participants Last post by  autx790
Hello and thanks,

please see attached, this is a bedroom being turned into a bath ...

My question is where do I vent the tub?

The joists run South to North as does the drain pipes ..

Would I be able to vent the tub on the South wall even though drains are going North?

Also, once the venting is done, how high up do you have to go in order to connect them together to form 1?

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I'm not sure your distances, but you should be able to combine your tub drain with the shower drain. If you're using 2" drain, I think the distance is 8' from the trap to the vent.

The south wall would be fine to run the vent.

I'm not sure what you mean how high up does it have to go to form one. The vent can not run horizontal until it is 6"s over the flood level (the highest point the water can fill) of the fixture. It has to extend i think about a foot over the roof, and there are also limits to how close to a window or other openings it can be.
Oh sorry, I meant combing the drain and the vent for both. At least the inspector here allowed me to (and I wouldn't see why you couldn't) have one 2" drain for the shower and tub. I would run 2" drains having the tub run into the shower and then one 2" vent running up instead of having 2.

Just checking...I hope "vents up to the attic" does not mean terminates in the attic.
They may require that where you are, but it seems according to the 2009 code, you can have a single vent.

Just checking. I had two vents all ending in my attic when I bought my house, and then the two exhaust fans on top of that.
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