Originally Posted by phillygreen
What size blowoff tube should you use? How do you get the tube air tight at the top of the carboy?
The easiest way is probably to get one that fits onto the post inside a 3 piece airlock. There's also this bungs that aren't drilled, but molded.... the hole one them is one a little knob in the middle, either 7/8" or 1" ID tubing will fit nicely over that knob. The latter is what I do, works like a charm.