Hey, I'm almost ready to start my second simpler extraction using the lazyman's tek. Before you say anything about that tek, I'm planning on using a 3-gallon glass carboy with plenty of water and lye to prevent emulsions, plus the tapered top of the carboy will help me pick up all the naptha. On the last pull I'll also put most of it through my sep funnel to get any remaining naptha. I really don't want to do an a/b extraction considering how long it took last time! And I really don't see much difference between lazyman's tek and noman's tek except for the use of a closed container (lazyman's uses an open bucket, noman's uses a plastic milk jug) unless I'm missing something? I'm also going to do a sodium carbonate wash after getting all the naptha.

With that said, I bought the carboy at a beer supply shop and couldn't think of a reason why I would need a stopper without a hole in it (for an airlock) as I don't know that much about beer making. Plus, I've read that naptha is a rubber solvent meaning my rubber stopper wouldn't work, correct? I can't think of anything else to really stop up the end of the carboy. PVC is probably not safe for naptha either assuming I could even find an end-cap that would work.

Any ideas? Thanks!

It seems like a nitrile stopper would be ideal but I'm having trouble finding those. Neoprene would probably also work, but not as well as nitrile. Anyone know a place to get either?

I guess if no one has any other ideas I may just put a nitrile glove or two over the stopper I have and put it in really tightly. It would probably still work...

hey new wave particle, I did an extraction in a 23L glass carboy, as a lid, I measured the neck, or spout, or whatever you would call it, and mine was about 2 inches. so I went to home depot, and bought a rubber cap with a hose clamp attached to fit 2 inch PVC or ABS pipe. the rubber caps for this type of pipe are chemical resistant, and i have had no problem using them

Thanks for the advice!