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Old 08-05-2012, 10:04 PM   #1
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Venting Kitchen Sink Under Window in California


Hi all! I'm realatively new to plumbing, and having a little trouble with fixing the existing hack job that I just found when I removed my sink to insulate an exterior wall.

Here's what I'm working with. One king and two cripples notched down to only 20% left on the backside. 36" window above a 34" sink in a 36" cabinet.



Code seems to prevent mechanically reinforcing with steel plate or moving the vent T below the floor ("wet"). Found this explanation on another site, but can't get my head around it. Does anybody have a diagram that might help me visualize it?

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Originally Posted by packy on plbg
you can run the drain up into the wall cavity beside the window. put a sanitary tee in that drain at 13" above the floor. continue the top of the san tee up thru the roof or into another vent stack in the attic.
turn the branch of the san tee at a 45deg facing into the kitchen. put a street 45 into the branch of the san tee and run a horizontal drain 3 feet to near the center of the window. this drain will set on the surface of the 2 x 4's and you will have to knotch the back of the cabinet to install it.

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Old 08-06-2012, 10:21 PM   #2
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Venting Kitchen Sink Under Window in California


*bump*

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Old 08-06-2012, 11:25 PM   #3
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Venting Kitchen Sink Under Window in California


Your other option is to stub out through the drywall in both stud cavities, then install cabinets, and drill and connect piping as needed in the back of cabinets. More than likely going to need piping graded at 1/4" per foot in cabinets. . . . .


Oregon plumbing code allows us to be as high as possible under structural conditions and then use drainage fittings if we are less than 6" above the flood level rim. Be sure there isn't a provision like this in CA code.
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