Rolled or Flat Wye

[Construction_Zone]

For the WC connection, would you recommend rolling the wye up or keeping it flat? Or does it matter?

 

[Terry]

Since this is off the lav line, it doesn't need to be rolled.

Rolled above the flow line of the 3" line is better though. If you don't, it still works.
We would maintain the 2" all the way with the vent instead of reducing to 1.5"

 

[Sponsor]

 

[Construction_Zone]

Thanks Terry.

Would you say the same for the wye to the shower that would be wet venting the shower?

 

[Terry]

Thanks Terry.

Would you say the same for the wye to the shower that would be wet venting the shower?

You should be fine either way with the shower.

 

[hj]

The 3x2 Y is immaterial so you can do it either way. The shower Y however MUST be flat or you will create either an "S" or "3/4S" trap, neither of which would be a good thing.