UP100 Home Brew Beer Kegs Ball Lock Cornelius Style Black + White Repair Disconnects This Quick Disconnect Coupler is of a Ball Lock design that works with Cornlelius pepsi kegs. These Ball Lock disconnects Fitting comes with a 1/4" barb already attached to it so all you have to do is hook up your tubing and you are ready to go. This fitting will work with 3/16" tubing as well, but you need to soak the tubing in hot water for 20 seconds to soften it up firs