The FOBSTOP is a very important component in any keg Beer dispense system.
The FOBSTOP comes into action when a keg runs out and shuts down the supply line rather than creating wasteful Fobbing or Frothing.
Where excess fob or froth has been generated this is removed by depressing the spring loaded vent button on the top of the FOBSTOP Detector thereby exhausting the excess gas which has caused the Fobbing.
Just as soon as the FOBSTOP Bottle Fills with beer again you can resume serving Fob-Free beer.