Please have a look at my photos and tell me do I really need to redo that U turn layout vent? If yes, I will redo it this weekend. that blue line is my original plan but i found it was too difficulty to go that way last weekend. now i may have to go that way.
Another question is can I use a tee in the drain to vent there. I know usually we should use wye or combo but the space is too tight. A tee or a wye will make a big difference in terms of space saving.
Another question is can I use a tee in the drain to vent there. I know usually we should use wye or combo but the space is too tight. A tee or a wye will make a big difference in terms of space saving.