Originally Posted by VIPlumber
If you can post a pic, we'll try to help you figure it out.
I'll work on that tonight thanks..
BUT in the meantime, I THINK I found a vent, but not 100% sure. The floor above is a toilet, and can find the drain line for it, Y'd to it is a smaller pipe (maybe 2") that is Y'd in the opposite direction of the drain, and goes up into the wall. It's attached downstream from the toilet about a foot - 18 inches..and from there it's probably 8 feet until it attaches to the main drain. I'm assuming a toilet drain would require a vent.
The only issue I have it if it's a vent it's Y'd level and parrallel to the drain pipe..
But I will try to get pictures..