GS3 steam and hot water wand repair kit – against the hissing at the joint
On the GS3, the steam wand and hot water wand sit on movable joints. You swing them over the jug, realign them, pull them back again. Exactly where the metal turns, gaskets are at work that have to seal and let things glide at the same time – and that eventually give way.
The first sign is almost always a sound: a faint hiss at the joint that wasn't there before. Next comes the limescale ring that returns after wiping, and finally a wand that no longer stays where you put it. This kit with part number SA309.R puts exactly these spots back in order.
When it's due
Hissing or steam escaping at the transition between wand and fitting. White limescale rings that come back after wiping. A wand that swings too easily or jerks when you swing it. Drips at the joint after heating up. And whenever the wand is removed anyway – a used wear kit doesn't go back in.
At a glance
| Type |
Repair kit for steam and hot water wand |
| Location |
Joint and fitting of the wands |
| Fits |
La Marzocco GS3 |
| Scope of delivery |
One kit; our documentation does not itemise the contents |
| Part number |
SA309.R |
| Version |
Repair kit for assembly SA309 |
| Installation |
Installation by a qualified technician recommended |
| Brand |
La Marzocco |
Important for installation
The fittings are under boiler pressure. Before any work, the machine is disconnected from the mains, allowed to cool down completely and the steam boiler is depressurised. We deliberately do not provide step-by-step instructions – a steam fitting opened under residual pressure is a scalding hazard. If you're unsure, have a qualified technician do it, or bring the machine to us.
Who it's for
For GS3 owners whose wands hiss or drift at the joint, and for service technicians who systematically renew the steam and hot water side during the annual service.
What goes with it
Individual sealing points are covered by the PTFE gasket for the steam wand. As wands, there is the GS3 steam wand in the non-insulated version and the Pro Touch steam wand; the complete valve is the complete GS3 steam valve. You'll find all other items under GS3 spare parts.
Barista tip from Bern and Zurich
Our own routine, not a manufacturer specification: after reassembly, we leave the wand under boiler pressure for five minutes without moving it and wrap a piece of kitchen paper around the joint. If it stays dry, the job was done well. Then comes the test cappuccino, usually with Cozy Chocolate, because the chocolate note tells you right away whether the milk temperature is right. For something nutty, try Nutty Delight; for something strong, Very Nutty. Everything under Coffee beans.
No returns
Original spare parts are excluded from exchange and return. They are sourced specifically for each order and cannot be resold after installation or a trial fitting on the machine. So before ordering, check the model, year of manufacture and serial number of your machine – or drop us a line and we'll clarify the fit together. Your rights in the event of defective goods remain unaffected.
Frequently asked questions
What is the part number of this kit?
Part number SA309.R. If you are working with a number from service documentation, compare it with this one before you order.
What is included in the kit?
Our documentation does not itemise the contents, so we don't list anything here that we can't back up. Tell us where your machine is leaking and we'll check before you order whether the kit covers it.
Does it cover both the steam and hot water side?
The item name mentions both. Whether that solves your case depends on which version is fitted in your GS3 – the series has changed over the years. Send us the serial number and we'll check.
Does it also fit a wand in the Pro Touch version?
There is a separate item for that, which we don't mix up with this one here. Tell us which wand is fitted on your machine and we'll give you the right kit.
Can I pick up the part in Bern or Zurich?
Yes. We have showrooms at Gerberngasse 44 in Bern and at Hagenholzstrasse 50b in Zurich. Drop us a line and we'll have the part ready for you.
Questions about fit? Write to us at [email protected]. We deliver across Switzerland and to Liechtenstein in 2-4 working days.
