Laundry Drain top and main floor tied in together?

Attachment 15738


Please tell me i can do this

Not if you intend to adhere to any legitimate plumbing code.

The lower trap would be required to have a dry vent.

Only if you live in Philadelphia and have an engineer certify it.

Attachment 15739

dont mind the sloppy drawing

yes it is. (I need to flesh the answer out because it will not post just the word "yes").