I took apart as much of the plumbing as I could which includes the
trap. The trap goes up into another pipe which is about twice the
diameter of the trap pipe that goes straight to the basement...that's
where I stopped.

Another poster mentioned proper venting....where is this venting
done?? All the pipes under the sink run into that larger pipe which
goes to the basement with nothing that looks like a vent.

On 4 Oct 2006 17:41:07 -0700, "Lawrence"
wrote:

You say there doesn't seem to be any clogs but what did you actually
check?