A sparkler is a device that can be attached to the nozzle of a beer engine. Designed rather like a shower-head, beer dispensed through a sparkler becomes aerated and frothy which results in a noticeable head.

The sparkler works via the venturi effect. As the beer flows through the nozzle, air is drawn into the beer. Consequently, the beer will have a head, whether or not the beer is alive (fresh).

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