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Old 11-12-2009, 10:41 PM   #1
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Under slab plumbing

Hi, i am installing new pvc dwv plumbing under the basement floor. (old concrete removed and new floor to be poured) there is a 4 inch stack that comes straight down the wall and then makes a short 45 deg to avoid the footer before becoming horizontal under the slab. The location for a toilet is just about 2 feet from the stack and almost directly over the horizontal 4 inch pipe. I have room to install a y and 45 deg combo to serve as the toilet riser. There would be no specific vent for the toilet other than the venting provided by the nearby stack. Is this arrangement acceptable or do i need to provide for a seperate vent for the toilet somehow? Thanks


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Old 11-13-2009, 05:27 AM   #2
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if your local codes permit wet venting you will be fine.


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