I'm going to put in rough plumbing for a bathroom in the basement while i have the floor torn up. I drew up a diagram, i wonder how exactly you'd plumb this...the whole width of the bath is maybe 10' max. Its going to go in the corner of the basement...so here it is...this is the view from directly above, looking down at the basement floor...



I want a showerstall on the left, sink in the middle, toilet on the right...

Right now, there are no walls. I am going to put 6" stud walls up so pipes can be run through them with ease. Because we are pluming our upstairs bathroom which is directly over this one, we need to tie in the 3" drain stack from above too - it can come down the wall at the top of the picture, preferably near the current drain. Vents must go up the wall at the top of the picture. The current "trench" i have busted out of the concrete floor is indicated in the diagram - it is 25" wide. The lav drain spot should actually be in the wall i imagine...1.5" lav drain, 2" shower, 3" or 4" toilet...

The current drain runs at about a 60/120 degree angle to the wall...it is 4" clay...i wanted to use a donut in it, reduce it to 3" pvc for the whole bathroom...but am open to other ideas...

So, how would you connect the dots?

I could probably enlarge the trench if needed...