Basement 3 piece wet vent?

[mco7]

the basement floor has been chipped in accordance to the drawing where I’m laying pipe now I’m wondering would this be legal and still work as a wet vent?

 

[James Henry]

Not sure what fitting you were planning on using at the intersection between the 2" and 3" drain.

 

[Sponsor]

 

[Plumber69]

make the vent 2 inch

 

[IPDQKWID]

Hi, this vent question is one I'm on here looking for. Is there any reason a guy couldn't go 2" vents throughout (say, an addition) where there are 2 bathrooms (shower, lav, WC each) and a new laundry room with laundry tub. Eventually the 2" vents tie into the 3" stack. But my real question is that all over I see 1 1/2" venting referenced. Is it a preference, or material cost, or does it have to do with airflow physics? Can venting be too big?

When I got my inspection prior to cementing the floor in, the plumbing inspector made me switch from 4" drains to 3". My three boys duke footballs, I wanted 4" - he made it sound like I was doing it wrong. Long story, but I'm still pissed. So I guess that's my real question - can venting be too big?

 

[mco7]

Not sure what fitting you were planning on using at the intersection between the 2" and 3" drain.

I was planning on using a 3x2 reducer then a 2” 45 to go to the 2 inch portion. would that still work as a wet vent.

 

[James Henry]

I was planning on using a 3x2 reducer then a 2” 45 to go to the 2 inch portion. would that still work as a wet vent.

Yes that will work.