LA MARZOCCO LINEA PB General Troubleshooting

0.6mm Ruby Gicleur / Flow Restrictor

The gicleur is the narrowest point in the group head's water path. Mineral scale precipitates under high heat and pressure, physically obstructing the 0.6mm aperture and causing low flow or uneven pressure. Replacing the restrictor restores the designed flow rate to the coffee puck.

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3-Way Group Solenoid Valve Rebuild Kit

This kit contains the plunger, spring, and O-rings required to service the electromechanical valve. Scale buildup on the solenoid plunger prevents the internal ruby seal from seating correctly, leading to constant dripping from the exhaust or a failure to open during the brew cycle. Rebuilding the valve restores the hydraulic seal and pressure discharge mechanism.

SKU: 912

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Group Head Diffuser Screen and Gasket Kit

Accumulated mineral scale and carbonized coffee oils on the shower screen disrupt the laminar flow of water. Replacing the screen and the 8mm group gasket ensures even water distribution and a high-pressure seal against the portafilter, preventing bypass leaks during extraction.

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