Group Under cup Seal 73.5x57.8x8.5 (12228)

**Astoria Espresso Machine Part: Group Undercup Seal 73.5x57.8x8.5 (12228)**

The Astoria Group Undercup Seal 73.5x57.8x8.5 (Part Number 12228) is a precision-engineered replacement component designed specifically for Astoria espresso machines. Crafted from high-quality, durable rubber, this seal ensures a perfect airtight fit between the espresso group head and the undercup, preventing any unwanted water or coffee leakage during the brewing process. Its exact dimensions—73.5mm outer diameter, 57.8mm inner diameter, and 8.5mm thickness—are meticulously designed to provide consistent, reliable performance and maintain optimal pressure within the group head.

This essential seal plays a crucial role in preserving espresso quality by maintaining the correct pressure and flow path during extraction. By establishing a tight, secure seal, it ensures that water is evenly distributed through the coffee puck, resulting in a rich, balanced espresso shot every time. Additionally, the premium rubber material offers excellent resistance to heat, wear, and coffee oils, which prolongs its lifespan and helps reduce maintenance frequency. This makes the undercup seal an indispensable part of daily upkeep for baristas and coffee professionals seeking to keep their Astoria espresso machines operating at peak condition.

Ideal for both commercial cafes and dedicated home baristas, the Astoria Group Undercup Seal is straightforward to install during routine machine maintenance or group head rebuilds. Using genuine replacement parts like this seal not only safeguards the longevity of your espresso machine but also helps ensure consistently exceptional coffee output. Stocking this part enables quick repairs, minimizing downtime and keeping your workflow smooth—an essential factor for any busy coffee environment or enthusiast aiming for barista-level espresso shots.