I suppose I misspoke calling it a 'closed transfer'. The top of the fermenter is open while transferring. I don't know how I would do it otherwise...
can you use CO2 where the airlock would be? not sure if spiedels can hold pressure though.
Yeah I suppose I could run tubing from a CO2 tank into the rubber bung. How much pressure are we talking about?
Doing this would become much more challenging for me. I have been meaning to get a smaller 5 lb tank for carbing kegs that are not in the serving fridge yet. Using the 20lb tank in the garage is less realistic because it would mean moving my whole operation.
sure, so what I setup is a 90degree nylon elbow in the bung, attached to 5/16" beer line, with a flared fitting on the end - this serves as my blowoff tube also (although I never have blowoff due to the amount of headspace I have). the flared fitting end sits in a jar of sanitizer and when I'm ready to rack, attach the CO2 line to the fitting, and it seems that 2Psi is all it can handle before popping off.