Hi all,
I am putting a powder room on the first floor of my house here in upstate New York. I'd like to wet vent the toilet. The toilet drains into a 3" pipe, which has a 2" pipe rising vertically from a combo wye/45 to a sanitee for the lav. My question is, can the dry vent from the sanitee up be 1.5", or does it need to be 2"? The reason for 1.5" is that I have very small clearance in the ceiling, and in order to run the vent straight up it would have to be 1.5". Otherwise it will require an offset of about 3' horizontal. If I can go straight up with the 1.5", it will rise about 15' vertically, then turn 45 degrees for about 10', then join the main vent stack. Here are some photos, from above and below. Again, this is New York State, so I'm asking about International Plumbing Code.
Thanks!
I am putting a powder room on the first floor of my house here in upstate New York. I'd like to wet vent the toilet. The toilet drains into a 3" pipe, which has a 2" pipe rising vertically from a combo wye/45 to a sanitee for the lav. My question is, can the dry vent from the sanitee up be 1.5", or does it need to be 2"? The reason for 1.5" is that I have very small clearance in the ceiling, and in order to run the vent straight up it would have to be 1.5". Otherwise it will require an offset of about 3' horizontal. If I can go straight up with the 1.5", it will rise about 15' vertically, then turn 45 degrees for about 10', then join the main vent stack. Here are some photos, from above and below. Again, this is New York State, so I'm asking about International Plumbing Code.
Thanks!