I have what appears to be a fairly large problem. My kitchen sink will not drain, not even slowly, unless I run the garbage disposal. Here's what I've tried: Plunging to no avail, removing the p-trap and snaking about 10' in, Drain-o (bad idea I know, but I was desperate), and THEN, in case it was just a ventilation problem, I installed an Air Admittance Valve--no dice.
I am in a top floor condominium (3 story) that's mid eighties construction but a recent conversion from apartments w/ a total overhaul. None of my neighbors are having similar problems (downstairs or next door), and there are no other clogs anywhere else in my house. I'm stumped. Help?