Group Head Gasket Repair Kit for Nuova Simonelli (Oscar, Oscar II, Musica, Appia and Appia II)

Grouphead gasket/seal Ideally, they should be replaced every 6 months, as rubber becomes brittle with the constant cycle of heating and cooling. Once the rubber becomes brittle, the group head may start leaking around the portafilter, the portafilter will generally start traveling past perpendicular and the seal becomes increasingly hard to remove. Shower screen These screens diffuse the group head water to spread evenly over the filter baskets where the coffee is.They can become lose and blocked over time, and need replacing. Generally they are replaced by removing the screw or bolt located in to center of the screen, attaching the shower screen to the shower screen holder. Stainless steel screw m6x16mm, Manufacturer: ZORJUST