There is only one tap that can claim a “zero leak rate”
(< 1 in 50 million since it was launched !).

To put this in perspective : the average adult wine drinker consumes about 30 litres per year in France. If all of this were 3L Bag-in-Box® wine with a Standard Vitop tap, the typical French wine consumer would have to wait for about 2.5 million years to experience a leaking tap.

Not much to worry about - as long as it is a 
Vitop Original® tap.