Want To Add Wash Sink In Garage--How To Drain

[Hammerlane]

OK...I think I see what you mean now...so Fitting "B" would be an elbow and not a San-T correct?

[Hammerlane]

turn ""C" to the left. Then go to a 2 x 1 1/2" combo on its back. Go up from the combo, (#1 would be moved further to the left, then over to the tee using a longer #2. A street elbow into the end of the combo facing out into th)e room will then be your trap connection. You can either install a 2x 1 1/2" bushing before the street ell and use a 1 1/2" ell or put the bushing into a 2" street elbow.

Wanted to redo the diagram according to your suggestion. Attached is the first way, then the first way revised according to hj's suggestion. In the revised drawing, fitting "G" is the street-90 that would pick up the trap.

Question:
what is the advantage to taking San-T "C", in the first drawing at rotating it like in the revised? why not just stub out from its first orientation?

[hj]

To quote professor 'Enry 'Iggins, "By Jove, I think he's got it." You could not keep the tee's original orientation unless you wanted a lot of pipe outside the wall.

[Hammerlane]

You could not keep the tee's original orientation unless you wanted a lot of pipe outside the wall.

I'm still gonna need the stub-out coming "out of the wall" from the Street 90(fitting G). Don't see how stubbing out from the Street-90 compared to the San-T saves pipe length coming out of the wall.

But I appreciate your advice....learning a little about venting.

Thanks