The small connection that keeps the group sealed
The adapter connects two water-carrying components on the brew group of the GB5. It is made of stainless steel, is constantly under brew pressure and is therefore often overlooked during an overhaul – until it turns out to be the part that drips.
A typical sign is a damp film on the thread that disappears briefly after retightening and is back two weeks later. In most cases the sealing surface is then warped or the thread is worn out. The part number is A.2.009.01.
When it is due
- Moisture or limescale traces at the transition to the group.
- The connection only seals when tightened excessively.
- Visible grooves, notches or a damaged thread.
- After an overhaul, pressure loss persists at this point.
At a glance
| Type |
Stainless steel adapter |
| Installation location |
On the brew group, inside the machine |
| Fits |
La Marzocco GB5 |
| Scope of delivery |
One adapter, without gaskets |
| Part number |
A.2.009.01 |
| Version |
Stainless steel, standard version |
| Brand |
La Marzocco |
| Installation |
Installation by a qualified professional recommended |
Important for installation
The part sits in a pressurised line inside the machine. We deliberately do not provide step-by-step instructions for it. The machine must be depressurised and cooled down, and the replacement belongs in the hands of a qualified professional.
Who it is for
For technicians who want to properly fix a leak at the group of a GB5, and for workshops that replace all connecting parts at once during an overhaul.
What goes with it
From our workshop in Bern and Zurich
We wipe every connection dry after reassembly and place a piece of kitchen paper underneath. After an hour under pressure, the paper shows what the naked eye misses. This is our routine, not a manufacturer requirement. For dialling in afterwards, the team likes the Nutty Delight from our coffee beans.
Returns excluded
Service parts are excluded from exchange and return. They are procured specifically for each order and cannot be resold once they have been installed or test-fitted on a machine. So please check the model, year of manufacture and serial number of your machine before ordering – or drop us a quick line and we will check the fit together. Your rights in the event of defective goods remain unaffected.
Are gaskets included?
No, the adapter is supplied on its own.
Does it also fit an FB80 or Linea PB?
Part number A.2.009.01 is listed for the GB5. Send us the model and serial number and we will check the fit.
How can I tell whether the adapter rather than the gasket is to blame?
If the spot becomes damp again after the gasket has been replaced, it is worth checking the sealing surface and thread of the adapter.
How long does delivery take?
Across Switzerland and to Liechtenstein, usually 2-4 working days.
Can I see the part at your premises?
Yes. We are in Bern at Gerberngasse 44 and in Zurich at Hagenholzstrasse 50b.
Not sure about the fit? Write to us at [email protected]. We deliver across Switzerland and to Liechtenstein in 2-4 working days.
