Hi,
I'm trying to follow IPC code, but I'm not sure I have this right.
The 4" combo wye is below a WC and to be plugged upstream with a C/O. The 2" pipe is the tub trap arm connected to a 2" combo wye draining a Lav and venting through the roof. The 2" drain for the lav is the Wet Vent for the WC and the Tub.
Questions:
a. Based on table 912.3 looks like my vent needs to be 3". Am I reading the code correctly, or will my layout work?
b. Can I connect the tub into the upstream side of the combo and call it a horizontal wet vent, or does it have to connect via a wye downstream of where the wet vent goes horizontal?
c. Any other issues here, or suggestions?
Thanks!