Hi all, I am replacing the existing sink vanity with a new pedestal sink and ran into a bit of a problem. When I removed the drywall behind the vanity (major overhaul ) I noticed that the existing p-trap dumped into a sanitary tee that vented straight up. Unfortunately, this will conflict with the 2x10 backing I need for the pedestal sink (2x4 walls won't allow both ). The existing vent system looked like this ('O' marks the spot of the p-trap, 'I's mark the stud locations):
The p-trap waste flows directly into the floor.
I want to rework the venting to the following configuration:
The main stack is less than 3' away so it isn't far but my concern is with the actual p-trap connection. I need to put the blocking above the p-trap do I don't really have room for a full revent above the trap adapter. Must the trap adapter be vented above?
P.S. I apologize for the "drawings"; they looked better before spaces were removed. I am attempting to publish a hand drawn version to link to or can PM anyone.
The p-trap waste flows directly into the floor.
I want to rework the venting to the following configuration:
The main stack is less than 3' away so it isn't far but my concern is with the actual p-trap connection. I need to put the blocking above the p-trap do I don't really have room for a full revent above the trap adapter. Must the trap adapter be vented above?
P.S. I apologize for the "drawings"; they looked better before spaces were removed. I am attempting to publish a hand drawn version to link to or can PM anyone.
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