Pot still fittings

[nantahala]

Hey guys!

As much as I've read and researched, I can't find a precise answer to my question.

I'm fabbing up a pot-still, the usual pressure cooker route.

My only question is how to fit the copper pipe to the pressure cooker lid. I don't want to solder and I don't want to use a cork or stopper. I'd like to only use pipe fittings. Has anyone come up with a good way to do this?

I'm not a plumber by any means, and I don't have any experience with fittings. I can imagine how it would work but I'm not sure what types of fittings are best to use for steam.

If anyone has a clear answer, I'd really appreciate it.