Double sink. Garbage disposal drain and reg drain merge at p trap and go into wall. Directly underneath is a second T that goes to that vertical pipe that ends with an
4 Easy Ways to Unclog a Double Sink - wikiHow
Better Undersink Plumbing - Fine Homebuilding
Acceptable Double Sink Garbage Disposal/P Trap Config? | Terry Love Plumbing Advice & Remodel DIY & Professional Forum
How to Install Dual Kitchen Sink Drain Plumbing Pipes - YouTube
plumbing - Is this horizontal drain pipe under kitchen sink a problem? - Home Improvement Stack Exchange
What is a double trap in plumbing?
Can I change the original 2-sided kitchen sink plumbing using a T connection to drain both through the same down pipe and free up space in the cabinet? - Quora
Double Sink Drain Pipe Kit, Expandable Stainess Steel Kitchen Basin Drain Pipe Set for Restaurant : Amazon.in: Home Improvement