Bathroom Wet Venting

[ECCsimmons]

So I've been doing a full remodel of our bathroom given water damage from the last owners. I've gone down to the joists & studs. Now I'm looking at drainage/venting solutions. I've got a few plumbers coming by in the next few weeks, but wanted to get a broader range of opinions.

I have a single standard vent of 2" going up through the roof at this point. I'm trying to avoid tearing out the ceiling, as it's the only damn thing in the bathroom that was salvageable. So I started looking into AAV (eeek, not liking what I've been reading) and wet venting.

So I went through and read a ton of code, and tables, and really get lost when they start talking about maximum distances from certain portions of the system to others based on pipe sizes. So here's a rough idea of what I would like to do, but I'm not sure if the piping sizes & distances will be up to code.

 

[Mr_David]

What code are you using?
Different strokes for different folks?

I was curious about which states follow which plumbing code and found this on the forums at terrylove.com and filled in and changed based on http://www.tests.com/State-Plumbing-Codes-License

Alabama IPC adopted by Local Governments
Alaska UPC adopted at State level but IPC in use locally
Arizona UPC adopted at State level but IPC in use locally
Arkansas uses IPC
California is based on UPC
Colorado uses IPC
Connecticut IPC effective Statewide
D.C. IPC effective in city
Delaware IPC effective Statewide
Florida IPC effective Statewide
Georgia IPC effective Statewide http://www.plumbingpros.com/pdf/dwvents.pdf
Guam uses IPC
Hawaii uses UPC
Idaho uses IPC
Illinois Develops their own code but IPC adopted by Local Governments
Indiana uses the Indiana Plumbing Code (as of 2012 it used 2006 IPC second printing)
Iowa IPC adopted by Local Governments and statewide
Kansas uses IPC
Kentucky State Plumbing Code based on IPC precursor
Louisiana State Plumbing Code based on IPC precursor
Maine IPC adopted by Local Governments
Maryland uses IPC
Massachusetts uses UPC, 248 CMR 10.00.
Michigan IPC effective Statewide
Minnesota uses Minnesota Plumbing Code
Mississippi IPC adopted by Local Governments
Missouri uses UPC
Montana uses UPC
Nebraska uses IPC
Nevada uses IPC
New Hampshire IPC effective Statewide
New Jersey uses NSPC
New Mexico uses the New Mexico Plumbing Code based on UPC
New York IPC effective Statewide
North Carolina IPC effective Statewide
North Dakota uses IPC
Ohio IPC effective Statewide
Oklahoma IPC effective Statewide
Oregon uses the Oregon Specialty Plumbing Code based on UPC
Pennsylvania adopted IPC
Puerto Rico IPC effective Statewide
Rhode Island IPC effective Statewide
South Carolina IPC effective Statewide
South Dakota uses UPC
Tennessee IPC effective Statewide
Texas IPC at State but Austin, Houston, San Antonio use UPC
The Texas State Board of Plumbing Examiners recognizes the 2006 editions of the UPC, IPC, & IFGC which means each city or town in the state can either adopt the UPC or IPC/IFGC regardless of edition.
Utah IPC effective Statewide
Vermont Use 1990 BOCA (BOCA now under IPC)
Virginia IPC effective Statewide
Washington uses UPC
West Virginia IPC effective Statewide
Wisconsin Plumbing Code Link
Wyoming Both IPC & UPC used by Local Governments

http://gisceu.net/PDF/U103.pdf

Changes made to Louisiana plumbing code in 2013
Louisiana does not allow AAVs and the allowable distance from trap to vent in a 2" drain was reduced from 8' to 6'.

Any corrections or additions?

 

[ECCsimmons]

Apologies, thought I added that. I live in Upstate New York, so IPC.

 

[Zanne]

If I understand correctly, IPC allows longer trap arm lengths than UPC. I think UPC had a limit of 36"? Someone correct me if I'm wrong. IPC has a chart based on the pipe diameter. I believe 2" pipe can run 5' or 6' before it vents. The general rule is that the drop can't be more than 1 pipe diameter (or else the water completely blocks the pipe and prevents venting).