Hydraulic cap for demijohns from 5 to 54 liters - 2 variants

Hydraulic cap for 5, 34 and 54 litre demijohns. (ATTENTION! The cap may change shape without notice, this is due to the momentary availability.)

Characteristics:
- Avoid having to add oil to the surface to preserve the wine;
- Made of food grade plastic;
- It acts as a vent for air that forms on the surface and could damage the quality of the wine.

Using the article:
When boiling, the article must be placed on top of the demijohn, with water in the upper part. The bubbler must only be placed on top.
When the wine is still, add some Vaseline oil and close the airlock on the piece underneath.