Illinois code allows it, but most inspectors make it 4" or 3". I have a remodel and I can either run the 5' of 4" for the shower, or the 2". Under concrete, in the basement. The shower base is 34"x48". My gut says run with the larger. So I will. Homeowner also feels better about it.
No announcement yet.
Would you run 2" pvc underground?