Pavoni piston for lever group

What is a group head piston

The piston is a moving part of the lever group head that, when the lever is pressed, pushes water through the coffee puck and creates the pressure needed for espresso extraction. Its movement inside the cylinder seal directly affects the pressure and speed at which water passes through the coffee.

How to spot wear

A worn or scratched piston loses its tightness against the group cylinder. This shows up as water leaking around the group, fluctuating or insufficient pressure, uneven extraction, and a change in coffee taste - it tends to become more watery or bitter. With greater wear, the lever's movement may become jerky or heavier.

When it's time for a replacement

A leaking piston means unstable extraction pressure, which affects the quality of every cup and can also put extra strain on other parts of the group. Timely replacement restores proper extraction flow and prevents further wear to surrounding components.

Selection advice

• Check the compatibility of the specific piston with your machine in the product's compatibility table.
• When replacing it, also check the condition of the adjacent seal, which wears out along with the piston.

Compatible with

• GRAN-ROMANTICA (200206-)
• ROMANTICA (200206-)
• ESPERTO-ABILE (202007-)
• ESPERTO-COMPETENTE (202202-)
• EUROPICCOLA
• EUROPICCOLA (200611-)
• EUROPICCOLA (201711-)
• EXPO-2015 (201505-)