A revolution in espresso machine cleaning! It allows 200mL of water to accumulate in a transparent spring-loaded chamber and releases this entire volume back through the group head, flushing the shower screen, diffuser, and 3-way solenoid valve directly into the drip tray. This ensures a faster and significantly more efficient cleaning process, as the chamber's capacity delivers 15 to 20 times the water volume per cycle compared to a standard metal blind filter.