Here is my kitchen sink drain configuration: (The horizontal run after the trap is actually pitched correctly, not as drawn.) The portions inside the wall are galvanized steel pipe. Under the sink, ...
Can the kitchen drain wet vent be on the same vertical pipe as the air vent going out the 2" roof? I also have a sanitary tee attached on the top that attaches the vent for the washing machine. Just ...
My kitchen sink drains through an S-trap immediately below the sink to another trap (a P? a U?) in the basement below. The drain pipe then runs along the wall till it meets the main drain pipe shortly ...