1 Gallon Carboy Screw Cap w/ Barbed Fitting
thingiverse
This is a cap that screws onto 1-gallon carboys. The barbed fitting can be used to connect a blow-off tube (3/8 in.) into a glass jar instead of using an airlock. It's designed for use with items like the link below, which has a detailed description explaining why you'd want a blow-off tube over an airlock. Check it out! http://www.thingiverse.com/thing:42617 Also consider joining the Home Brew group on Thingiverse: http://www.thingiverse.com/groups/brewing/about
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