Double sink plumbing into a single pipe.
Hi,
I am living in an apartment. I have a double sink that drains into a single pipe fixture. It is cheap PVC piping and my landlord is a deadbeat. Doing dishes is nearly impossible because the drainage is constantly backing up into the sink. Please help me define what I need to alter the flow of drainage. I am not familiar with technologies, so I would need to learn in layman's terms what I can do to fix the problem. We currently have a tube flowing back into the sink to give some type of air pressure to the drain, but it is not helping very much. A diagram would be helpful as to how the plumbing should actually look for this kind of structure. Thank you so very much.
Tricia