Foam on Beer Detector (FOB) to Purge Oxygen from Kegs - KL00802 Brand_Duotight Includes removable metal chalkboard insert

Includes removable metal chalkboard insert

but can be sensitive to long soaks in cleaners and acid-based sanitizers

Lockable compression lid with high quality seal

Construction:

Foam on Beer Detector (FOB) to Purge Oxygen from Kegs - KL00802 Brand_Duotight Includes removable metal chalkboard insertFoam on Beer Detectors, or FOBs, are commonly used in commercial draft systems as a way to eliminate product waste and increase profits. When a keg completely empties and foam passes into the FOB it will shut off flow and in doing so keep the draft line completely full of beer until a new keg is tapped. This means you can hook a fresh keg and continue pouring without foaming issues, preventing you from wasting beer that is otherwise needed to refill