On Sat, 29 Jan 2011 18:25:26 -0500, aemeijers wrote:

On 1/29/2011 5:57 PM, Oren wrote:
On Sat, 29 Jan 2011 14:48:46 -0800 (PST),
wrote:

On Jan 29, 2:50 pm, "Ed wrote:
Obviously, you either need a smaller diameter washer or a larger diameter
pipe. Maybe you'll have to change it out unless you can seal it with the
other suggestions. It may be just as easy to swap the pip, but I can't see
it so can't say for sure.

Everything's 1-1/2". That's why its driving me nuts.

Is anything binding, not fitting together easily before tightening the
nut? There is not much fight if things fit.

Pictures?

I'm hearing some faint bells go off here.

Yep.

I had a similar leak until I
(a) pointed the damn washer in the other direction and

....or accidentally threw it out.

(b) went out and
bought a metal nut, rather than the plastic one that came with the trap,
to hold the tailpiece into the metal pipe coming out of the wall. Not
sure if that applies to OP's situation, but unless he already threw out
the old parts, it doesn't cost anything to try.

Unless it's a new installation (within the last couple of years) I now throw
away the washers and plastic nuts and use new ones. These things are cheap
and are often damaged in a way that's not obvious.