Wega / CMA Espresso Machine 3-Way Group Solenoid Valve E131F4304

Wega / CMA 3-Way Group Solenoid Valve – E131F4304

Restore reliable group head operation on your Wega or CMA commercial espresso machine with this genuine 3-way group solenoid valve (E131F4304). The 3-way solenoid controls water flow to the group head during extraction and releases residual pressure through the drain after the shot — a faulty solenoid causes dripping, failure to brew, or water not releasing after extraction.

Specifications

• Part number: E131F4304
• Outlet: ø1/8" conical
• Max pressure: 10 bar
• Seal: RUBY seal, orifice ø1.5mm
• Coil: 483510S6, 9W, 220/240V, 50/60Hz
• Fluid temperature range: -40°C to +140°C

Compatible Models

• Wega Pegaso
• Wega Atlas
• Wega Polaris
• CMA espresso machines

Symptoms of a Faulty Group Solenoid

• Water dripping from the group head when the machine is idle
• No water flow to the group head when brewing
• Residual pressure not releasing after extraction (puck sticking)
• Solenoid clicking but not opening or closing correctly
• Burnt or failed coil (no click when energised)

Frequently Asked Questions

What does a 3-way solenoid do?

The 3-way solenoid valve has three ports: it opens to allow pressurised water into the group head during brewing, then switches to release residual pressure through the drain line after the shot ends. This prevents the portafilter from being locked in under pressure and keeps the puck dry for easy removal.

Is this compatible with my Wega or CMA machine?

This solenoid suits Wega Pegaso, Atlas, and Polaris models, as well as CMA espresso machines. If you are unsure of compatibility, contact us with your machine's model and serial number before ordering.

Can I replace this myself?

Solenoid replacement involves working with mains voltage electrical connections and the machine's water circuit. We recommend this be carried out by a qualified technician. Our Sydney-based team can assist — contact us to book a service.