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Old 06-13-2012, 04:08 PM   #1
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Horizontal dry vent?


Can I use the old tub drain as the new horizontal dry vent as pictured? The old tub drain will be removed then connect the old vertical vent pipe to the old horizontal tub drain to form the new horizontal vent?
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Old 06-13-2012, 05:26 PM   #2
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Horizontal dry vent?


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Can I use the old tub drain as the new horizontal dry vent as pictured? The old tub drain will be removed then connect the old vertical vent pipe to the old horizontal tub drain to form the new horizontal vent?
I can't speak for Seattle code but-
You are creating a horizontal wet vented section. The vent needs to be on the shower trap arm and needs to be above the center line of the trap arm. And of course, have grade.

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Old 06-13-2012, 06:45 PM   #3
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Horizontal dry vent?


Thanks Eplumber. I guess I'll have to stick with the system that has most work but gurantee pass the code.
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Old 06-13-2012, 06:52 PM   #4
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Horizontal dry vent?


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Thanks Eplumber. I guess I'll have to stick with the system that has most work but gurantee pass the code.
One problem there my friend. You can't use san tees on their backs when used as a drainage fitting. I know it kills you for grade but you must use a wye and 45 (combo).
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Old 06-13-2012, 07:01 PM   #5
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Horizontal dry vent?


Oh noo ... That's sad news but the setup in my picture is the tallest, tightest I can fit without the whole assembly higher than the subfloor Thanks for pointing that out
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Old 06-13-2012, 07:01 PM   #6
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Horizontal dry vent?


This should work?
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Old 06-13-2012, 07:47 PM   #7
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Horizontal dry vent?


No because there's another fitting there that connects to the 3 or 4 inches toilet drain pipe there ... I'll play with the pipes/fittings a bit to see what I can do ... thanks again!
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Old 06-14-2012, 09:48 AM   #8
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Horizontal dry vent?


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Oh noo ... That's sad news but the setup in my picture is the tallest, tightest I can fit without the whole assembly higher than the subfloor Thanks for pointing that out
EPlumber is technically correct, but that doesn't mean what you want to do won't work. I once owned a house that had a couple of sanitary tees on their backs. They had been that way for at least 50 years.

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