The Franke Siphon 2 (Lira 2) Plumbing Kit is a reliable, high quality kit for your kitchen or utility room for years to come. For 1.5 and double bowl sinks.
Plumbing Kit For Double Bowl Kitchen Sinks, Includes Appliance Branch
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
plumbing - Venting a double kitchen sink (converting from an S trap to a P trap with AAV in a tight space) - Home Improvement Stack Exchange
Kitchen Ideas: A Better Sink Drain | Family Handyman