Carboy caps work to cover carboys as an alternative for regular stoppers. They have two spouts, one to facilitate a blowoff hose and the other for an airlock.
They also give you the ability to attach a racking cane directly through the larger middle stem. Combined with a CO2 tank or other method to slightly pressurize the vessel, you can push your homebrew easily for racking into another container. This makes the carboy cap a dual purpose tool to add to your brewing setup.
Carboy caps are also useful beer, wine, mead, or soda. Be sure to select the correct size cap for your carboy. Orange carboy caps are typically for 3, 5, and 6 gallon glass or plastic carboys. The blue caps are for 6.5 gallon glass carboys.
