La Marzocco Group 3-Way Solenoid Valve 230V – GB5, FB80 and Linea PB (B.2.004/01)

La Marzocco Group 3-Way Solenoid Valve 230V

Genuine La Marzocco 3-way solenoid valve rated 230V, part number B.2.004/01. This valve controls pressurised water routing to the brew group and vents residual pressure back to the drip tray at the end of extraction. A failed solenoid is one of the most common causes of group dripping, water hammer, and slow pressure release on La Marzocco commercial espresso machines.

Compatible Models

Part Details

• Brand: La Marzocco
• Part Number: B.2.004/01
• Type: 3-way solenoid valve
• Voltage: 230V
• Weight: 0.2 kg

Why Is Water Dripping from the Group Head? A Short Maintenance Guide

A group head that drips water between shots — or floods the drip tray after extraction — is a clear sign the 3-way solenoid valve is failing. Here’s how to diagnose it and what to do.

How Does the 3-Way Solenoid Valve Work?

During extraction, the solenoid opens to route pressurised water from the pump to the brew group. When the shot ends, it closes the inlet and simultaneously opens a vent port to release residual pressure from the group back to the drip tray. This pressure release is what causes the brief hiss and drip you hear after every shot — it’s normal. What’s not normal is water continuously dripping, flooding, or the group holding pressure long after extraction ends.

Signs the Solenoid Valve Has Failed

Watch for these symptoms on your La Marzocco GB5, FB80, or Linea PB:

• Group dripping between shots — water slowly drips from the group head even when the machine is idle.
• Drip tray flooding — large volumes of water are vented to the drip tray after extraction, indicating the vent port is stuck open.
• Water hammer — a loud banging or knocking when the pump activates, caused by the solenoid not opening smoothly.
• Slow or no pressure release — the puck remains under pressure after the shot, making the portafilter difficult to remove.

Can You Clean It Instead of Replacing It?

Occasionally. If the fault is caused by scale or coffee oil buildup on the valve seat, back-flushing with a blind filter and group cleaner can restore function temporarily. However, if the rubber seat or plunger is worn, or the coil has failed electrically, replacement is the only reliable fix. Given the cost of downtime on a commercial machine, replacing the solenoid is usually the faster and more cost-effective decision.

Frequently Asked Questions

Is this the same solenoid as the one used on the Linea Classic?

Part number B.2.004/01 is confirmed for the GB5, FB80, and Linea PB. The Linea Classic may use a different valve. Contact Bear Coffee Machine to confirm compatibility with your specific model before ordering.

Does replacing the solenoid require removing the machine from service?

Yes. The machine must be fully isolated from mains power and water supply before the solenoid is removed. Depressurise the boiler and group circuit completely before disconnecting any fittings. This repair should be carried out by a qualified technician.

Do you ship Australia-wide?

Yes. Bear Coffee Machine ships to all Australian states and territories with fast dispatch.