On Sun, 08 Aug 2010 17:44:17 -0700, Oren wrote:

On Sat, 7 Aug 2010 10:53:59 -0700 (PDT), Ian
wrote:

Any advice on what to look for or do next?

Take two steps back. Did I change the plumbing under the sick? Did I
forget too knock out the plastic thing from the new disposal plumbing.
Is the anti-siphon tube at attention or attached to the sink?

There is a check valve in the drain line at the pump. Stuck?