Foam on Beer Detectors (FOB) help to reduce beer waste and maximize profit by shutting off the flow to the tap as soon as the keg empties. FOB-08's stainless steel construction and symmetrical float virtually eliminate the hygiene problems associated with other models. The self sealing vent mechanism rotates 360 degrees for easy vent line installation. The quick release system for venting and float lifting, along with tool free disassembly, make it simple to use. NSF Approved