What is an O-ring and what is it for
An O-ring is a small circular seal used in a coffee machine in dozens of places – in the hydraulic circuit, on pistons, valves, nozzles, hose connections or in the steam wand. Its job is to seal the joint between two parts so that water, steam or pressure cannot escape through it.
Typical signs of wear
Over time it loses elasticity, hardens or cracks. This shows up as water or steam leaking around the joint, dripping under the machine, a drop in pressure when brewing coffee, or hissing and humming when steam flows through. Sometimes wear even affects the taste of the coffee, when the leak alters the extraction pressure.
When it's time for a replacement
A damaged O-ring may look like a minor detail, but a long-term leak of water or steam can damage surrounding parts and reduce the coffee machine's performance. Replacement is a quick and cheap fix that prevents bigger problems.
How to choose the right one
- The key factor is size – the diameter and thickness of the ring, or the material stated with the product.
- Check the compatibility table on the product page according to your coffee machine's model.
- If ordering several pieces, it's a good idea to keep spare O-rings in stock, as this is a part that wears out regularly.
Compatible with
- F2
- F2-PLUS
- Coffeebar
- COFFEEBAR-PLUS-B
- Coffee-zone
- MINIBAR
- Minibar-Coffeebar-Plus
- Minibar-S1
- Minibar-S2
- F3
| Compatible with | F2, F2-PLUS, Coffeebar, COFFEEBAR-PLUS-B, Coffee-zone, MINIBAR, Minibar-Coffeebar-Plus, Minibar-S1, Minibar-S2, F3 |
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| Manufacturing company | Suzhou Dr.coffee System Technology Co., Ltd. |
|---|---|
| Address | No.3 Building, No.55 Taishan Road, New District, Suzhou, Jiangsu 215151, China |
| info@dr-coffee.com | |
| Manufacturer's representative in the EU | Espresso Professional, s.r.o. |
| Address of representative in the EU | Vorařská 2075/6, Prague |
| EU representative email | info@espressoprofessional.cz |


