Wet Vent setup

[Xuno]

Hello all,
I would like to know if my mocked up wet-vent setup is right (should be a pic below and assume fittings are sealed and such)

The vent stack is on the 2" sink drain (2" through roof).
Assuming I'm on the right track, will it be best if I swap the sink drain (vent) with the shower drain, move sink closest to toilet and shower furthest of the two?
Will it make more sense, and make the system work better if I replace the 2" -> 3" junctions with a 3" x 2" double Y?

The line coming in from the right in the bottom will be the 2" soaker tub drain, that will be connected to the pain vent stack so will not be wet vented.

 

[Reach4]

Under IPC, I think the shower has to connect downstream of the lav drain. The 90 under the lav needs to be a long sweep. And I think that pipe under the lav needs to be 2 inch below the sanitary tee.

 

[Sponsor]

 

[Xuno]

Under IPC, I think the shower has to connect downstream of the lav drain. The 90 under the lav needs to be a long sweep. And I think that pipe under the lav needs to be 2 inch below the sanitary tee.

Thank you!
For the Lav drain, From the tee I am going 2 inch downstream and 2 inch through the vent, with 1.5 inch trap. I'll make sure to add a long sweep 90 under lav.
For the shower and lav order, would it be ok to have them at the same location with a double "Y" fitting, or does the vent side (lav) need to up upstream of the other one (shower in this case)?

 

[wwhitney]

Assuming I'm on the right track, will it be best if I swap the sink drain (vent) with the shower drain, move sink closest to toilet and shower furthest of the two?

It is required that you do so. Only one fixture drain may be "upstream" of the wet vent's connection to the branch drain.

Will it make more sense, and make the system work better if I replace the 2" -> 3" junctions with a 3" x 2" double Y?

It will be worse, as you will not be able to individually adjust the slopes of the two branches coming into the 3" drain.

Stick with two separate 3x3x2 wyes, with the sink wye upstream of the shower wye.

Cheers, Wayne

 

[Xuno]

It is required that you do so. Only one fixture drain may be "upstream" of the wet vent's connection to the branch drain.


It will be worse, as you will not be able to individually adjust the slopes of the two branches coming into the 3" drain.

Stick with two separate 3x3x2 wyes, with the sink wye upstream of the shower wye.

Cheers, Wayne

Great!
Thank you.