Riser Diagram help - NJ NSPC 2009 attic bath

Hi everyone - first post, great info here, but haven't been able to find my specific situation. This is a new attic level bathroom & I hope to only require one vent due to difficulties working on the steep roof. I think I am reading the code right (2009 NSPC in NJ) that the WC can be up to 8' from the wet vent within a bath group and the lav and shower can be up to 9' away horizontally with 2" pipe. Will this layout work? I have a number of restrictions due to the framing below and the main will go from the WC to the right of the plan before going over a beam and down into a closet. The vent will be in wall behind the WC, the skylight is fixed.





Thanks for looking!

Nope. none of the fixture traps are within trap to vent distance

Tom Sawyer said:

Nope. none of the fixture traps are within trap to vent distance

Click to expand...

Thank you-

The lav and tub or also the WC?

What about this? Tie the shower directly to the main and use the 3" as a wet vent?

The toilet flushing past the tub could siphon the tub's trap. If you vent the tub, the rest works.

You still need to make sure you are within the minimum distance for wet venting the WC.

cacher_chick said:

The toilet flushing past the tub could siphon the tub's trap. If you vent the tub, the rest works.

You still need to make sure you are within the minimum distance for wet venting the WC.

Click to expand...

Thank you! I will vent the tub separately.

Where does the measurement start for the WC to the vent? Is it from the wye to the stack?

It is from the toilet's trap to the "Y".