combination wye

The circled red section is where my drains exit to septic. This is horizontal, and for space reasons I need it to Y like this from both sides. My question is, how can this be done to code? I found this intersection setup and it explains, "Internal construction directs the flow from the branches...

Hello, We are trying to connect a "P" trap to the main waste line. and maintain max. 24” between the fixture outlet and connection to the “P” traps. My modeler, has introduced combination wyes to make up the elevation difference between the horizontal pipe extension from the "P" trap and the...