On Saturday, February 25, 2017 at 10:46:43 AM UTC-5, yky wrote:
On 25/02/2017 21:47, trader_4 wrote:
On Saturday, February 25, 2017 at 10:13:39 AM UTC-5, trader_4 wrote:


Here is a diagram of what you're talking about, for everyone's
benefit:


http://removeandreplace.com/wp-conte...fication-1.jpg

It looks like this one is made to seat with the rubber at
least partly on the smooth part, not on the so that it seals.

Not sure why yours is like it is. Putting silicone on the threads
when assembling it might work though if you can't figure out
the correct solution.

Thanks for the diagram.

In the diagram, between the overflow holes and thread, there is some
unthreaded area. If the gasket goes to the unthreaded area, it'll not
leak. In my case, the gasket goes to the threaded area and it leaks.

Agree, which sounds like the drain is made for a thicker sink
where the nut will tighten up while the seal is still on the
smooth, unthreaded part.

I'd go back and look at other ones where you bought it or
go to a plumbing supply.