I'm putting a bathroom in my basement. The plumbing is roughed in. This is the setup:

4 inch stub toilet
3 inch stub (18 inches out of concrete) vent
2 inch stub and approx 12 inches from that is a 12 by 12 covered hole (has a 2 inch capped pipe below the cover) The contractor told me that one is for a shower and the other for a tub. I only want a shower.
Another 2 inch stub (lavoratory?) close to another wall several feet away.
Also there is a stub coming from the floor above (contractor said this was the vent)

My questions are the following:

1. Does the shower stub have a p-trap underneath the concrete?
2. How would you vent this system?

Thanks,

Tom

HeyTom,

"My questions are the following:
1. Does the shower stub have a p-trap underneath the concrete?
2. How would you vent this system?"

1) Yes, The shower stub-up comes off the top of the trap.
2) The lavatory stub-up will extend up 18" from the floor to the center of a 2 X 2 X 1 1/2" sanitary tee. The branch of the tee will stub out from the wall to pick up the lavatory and you will extend the 2" pipe up from the top of the tee to connect to the pipe coming out of the 1st. Floor to vent the entire bathroom group. Good luck, Tom