An easy question.

Didnt get any answers on my last post so I thought I would simplify the image and query.

Are 3" wyes acceptable in this situation?

The fittings below can be 3"

They can be 3" but they have to be the correct 3" fittings.

Yall are great.

I was going to use a 3x3x3x2 left side outlet sanitary tee, a street 45 and then a wye with a cleanout.

Does that sound right?

A combination Y-1/8 bend will do the same thing and eliminate a joint in the process.

hj - would a "wye-1/8th(combination)" with the "left-out-sant-tee" on top be taller, shorter or the same height overall vs. a "wye + 45" with a "left-out-sant-tee" on top? Im having clearance issues so I need something that is really compact in height. Part of the reason I dont want to use 4" fittings.

Also, in general, is there any difference in performance between a "wye-1/8th(combination)" vs. a "wye + 45"?

I would think a "wye + 45" is better since there is a longer sweep which gets the waste flowing in the right direction for a longer time helping it downhill whereas a "wye-1/8th(combination)" would be more likely to "plop" it down like a regular sanitary tee in that configuration. Is this correct logic?