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Discussion Starter #1
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?

Thanks,
 

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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. http://publicecodes.citation.com/icod/ipc/2009/icod_ipc_2009_9_sec006.htm

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.
 

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Discussion Starter #3
Thanks for the info.. I spoke with the city and yes I can combine the drainlines but only after each has a vent so I am still stuck w the problem..

if you look at the picture, the short North wall of the shower is about 4 feet away from the center bathtub drain ...

It looks like the solution would be to run the drainline at an angle to that wall and then go up, run the shower to the same wall as well for its vent, then combine the 2 in order to reach the toilet / main stack ...

The only problem there is for the bathtub to reach that short wall, I have to go through 2 floor joists ...

So it would end up looking something like this ...

Thoughts?
 

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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.
 

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Discussion Starter #5
Thanks again .. I will check on this but they just told me today I need a single vent for every trap ...

And yes, the terminates in attic just means getting it up there in the attic so we can combine lines and use existing vents out of the house ..
 
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