T500 Reflux column leak

[Leatherman]

Hi everyone,

So as it says in topic name, I have a leak in top of column of T500. Attaching picture. And no, it is not condensate. Does anyone have any ideas how to fix it? It looks as a very minor leak, but it is still a leak. Or maybe does anyone know how long this column has a warranty? Could find that info.

Many thanks for your answers.

[Icefever]

Is the leak the dark ring around the copper pipe???? when you say "it is not condensate" are you saying it's not the vapour?? or it's condensation ??

[Mash]

I can't see the leak - is it me?

[Easydrinker]

I have viewed as a large image and am struggling to see a leak also.
The dark gasket does appear darker in one place..

Robert.