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Unread 07-12-2007, 09:31 AM   #10
Brian in San Diego
AC Specialist -- Schluterville Graduate
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Join Date: Oct 2005
Location: La Quinta, CA and Usk, WA
Posts: 10,791

I perfectly understood what you are trying to do and code says you can't do it that way...unless you have alot of room under the subfloor. You mention a 1.5x1.5x2 tee...again a no-no for a shower installation. If you think that catching that vent is the only way your shower will work then here's how it would have to be...kerdi drain, 2' trap and a 2x2x1.5 tee with the branch pointed straight up. The branch (1.5) would then have to be reconnected to the existing vent line (with a continuous slope up from the connection). The 2" main would have to be connected to the existing 2" waste line going toward the stack. Where is the existing tub drain and vent? I'm not saying your plan cannot be accomplished, but the way you are trying to go about it violates the UPC.

Yes, you can split the 2" with a 1.5x1.5x2 sanitary tee.

If that doesn't work, I'll always think it should have.
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