Simple vertical wet venting for two stories?

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alesage

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I'm in Chicago, we're renovating the two kitchens: moving the plumbing to the exterior wall, and hopefully adding a compact washer and dryer to each apartment.

It's a two-story apartment building with a basement. The kitchen sinks drain into the same stack--please see the diagram attached.

Is this simple wet venting legal in Chicago? I believe horizontal wet venting is legal up to a certain length. Is vertical wet venting legal? And what are the size/DFU constraints if so?

I can imagine adding a "vent stack" parallel to the main which would have to jog around the sink drains--of course we'd like to avoid that complication if it's not necessary (a washer vent would further complicate).

The walls are open and we have a lot of freedom to upgrade but we want to do it right :) .
 

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Jeff H Young

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I think Chicago has its own code. That looks more like stack venting to me , verticle wet venting between floors is prohibited in my code . adding 2 wash machines might or might not fly Im not real optomistic suds reief could be an issue .
And again please fill us in on specifialy what plumbing code governs you and size of that piping
 

John Gayewski

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You can't do the drawing. We venting is legal in Illinois. You need a parallel stack for the vents. Drains can all go into the drain stack and vents go into the vent stack, but your can't wet vent between floors.
 
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