and the center relief valve must be locked open to vent and allow the pump to draw water properly
If you're seeing inconsistent grind size or the burrs won't seat flush no matter how you adjust them
If retrofitting into a CD or S model
threads on an M10 handle of your choice
which is why this valve shows up on both boiler fill and steam-actuated circuits
Rancilio Espresso Coffee Pod Kit | Adapter - Conversion - Modification classe-6-parts/classe-6-e-hydraulics-2008 and the center relief valveRancilio Pod Conversion Kit for Pod Adaptable Group Heads This factory kit converts a newer, pod adaptable Rancilio group head to run ESE style coffee pods instead of ground coffee. It's a genuine Rancilio kit (OEM #10705403), not a generic adapter, so every seal and plate is sized to match the group exactly. SPECIFICATIONS Kit contents: 41x1. 78mm Viton O ring, group diffusion plate, 45x3. 5mm NBR O ring, instructions, pod filter basket, M5x12 group