Home built in ‘47.
Has a cesspool with a 4’ pvc vent on top of it.
No vent stack in the house. There was an original bathroom in the basement that is now “decommissioned”; all drains go into the slab. The new plumbing depends on AAV’s.
I called all this out. But my question is, how did the original bathroom ever work with no vent? I don’t know if the cesspool had an original vent before the pvc, but still, what difference does that make?
Anyone run into this before?