La Marzocco Group Gasket incl. 2 Anti-Shock Plates for KB90 – Genuine Spare Part
Every time the portafilter is locked into the KB90's brew group, an unassuming gasket has to absorb the full pressure of the extraction – tight, dimensionally stable, heat-resistant, shot after shot, over hundreds of pulls a day.
On the KB90, the saturated brew group delivers particularly balanced temperature behaviour, regardless of the number of groups. The group gasket sits exactly where portafilter and brew group meet, and the two included anti-shock plates additionally protect the material from the recurring temperature swings it's exposed to during locking and unlocking.
Why this particular part gets replaced so often
Rubber loses elasticity over time under recurring heat and mechanical pressure – a process that progresses faster on heavily used machines than with occasional use. A group gasket that no longer seals fully first shows up as water escaping sideways at the portafilter or a portafilter that becomes harder to lock in.
The included anti-shock plates extend the lifespan of the new gasket by cushioning the direct heat shock it experiences on contact with the brew group.
At a glance
| Compatible with | La Marzocco KB90 |
| Included | Group gasket incl. 2 anti-shock plates |
| Material | Rubber, heat-resistant |
| Origin | La Marzocco, Florence, Italy |
Who it's for
For everyone running a KB90 daily where water escapes sideways at the portafilter or locking it in has noticeably become harder. One of the maintenance jobs that comes up regularly on heavily used machines.
Goes well with
For the grinder next to the KB90, take a look at our coffee grinders – from the Varia VS3 to the Weber Workshops EG-1. For dosing, our coffee scales from Normcore to Acaia are a good fit, and for daily cleaning our cleaning products are a good fit. More on the KB90 can be found in our La Marzocco Collection.
Frequently asked questions
How do I know the group gasket needs replacing?
Water escaping sideways at the portafilter, or a portafilter that becomes harder to lock in, are the clearest signs.
What do the anti-shock plates do?
They cushion the direct heat shock when the gasket contacts the brew group, extending its lifespan.
Can I replace it myself?
Replacing the group gasket takes a bit of technical skill. If you're unsure, we're happy to help directly or recommend a service appointment.
Can I see the product before buying?
Yes, in our showrooms in Bern (Gerberngasse 44) and Zurich (Hagenholzstrasse 50b) you can experience the genuine spare part live.
The roastery tip
A machine in continuous use deserves beans you can rely on. Our main recommendation: Cozy Chocolate and Nutty Delight, dense, aromatic, full-bodied. For maximum body with no acidity at all: Very Nutty. For anyone who wants to discover a fruity experience: Wild Peach, lively and always a discovery. Our recommendation from the roastery, one of many.
