Expansion Valves for your Rancilio Classe 10, Z11/Omicron, and S20 System Espresso Machines. Part # RA_10.060.460.
Technicians Tip: If water is dripping into your drip tray from a small copper pipe (or silicone pipe, Classe 10) during normal operation, it means the expansion valve is worn and must be replaced. Note: All machines will drip initially during the start-up phase and is normal (that's the expansion valve working).
The Metric "1/4" thread is actually about 1/2 inch across and the Metric "3/8" is actually about 5/8 inch across for reference purposes.
Warranty / Manual
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