The dispenser 1 comprising an air pump connected to the water discharge device and the chamber and operable so as to flush the capsule with air after introduction of water into {HEAD ~ the capsule} so as to empty the capsule of liquid and prevent back {TAIL ~ flow} of liquid into the dispenser 
to prevent back
The dispenser 1 comprising an air pump connected to the water discharge device and the chamber and operable so as to flush the capsule with air after introduction of water into { HEAD ~ the capsule } so as to empty the capsule of liquid and prevent back { TAIL ~ flow } of liquid into the dispenser
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