Identify Improper Wall Drain Fitting

What happens here

With the P-trap removed, examine the fitting coming out of the wall. The video points out that it's a combination Wye & 1/8 bend, not the standard San-T fitting typically used for sink drain connections. This improper fitting contributes to the drainage issues and will need to be adapted to ensure proper flow.

Goal: After removing the P-trap, the video identifies that the drain line coming out of the wall is not a standard San-T fitting but a combination Wye & 1/8 bend, which is not ideal for a sink trap arm connection.