Silicone Steam Ring Gasket (54mm) compatible with Breville 450, 500, 810, 840, 860, 870, 878; Sage 500, 870, Bambino Plus BES450, Barista Express BES860, Infuser BES840
High-temperature resistant 54mm silicone steam ring grouphead gasket for espresso machines. Made from food-grade, BPA-free silicone that ensures a tight seal to prevent water leaks. Durable design can handle temperatures ranging from -65°F to 450°F.
Key facts
- Part type
- Grouphead Gasket
- Included
- 1-pack
- Type
- Aftermarket replacement
Compatibility matrix
Only models verified by our team are listed| Parts for | Model | This part |
|---|---|---|
| Breville | Breville 860 | Fits |
| Breville 810 | Fits | |
| Breville 840 | Fits | |
| Breville 878 | Fits | |
| Breville 500 | Fits | |
| Breville 450 | Fits | |
| Breville 870 | Fits | |
| Sage | Sage 500 | Fits |
| Sage Barista Express BES860 | Fits | |
| Sage Infuser BES840 | Fits | |
Only the models listed above have a confirmed catalog fit. If yours is absent, compatibility is unknown, not ruled out. Compare the exact model identifier and any published dimensions or connectors before ordering.
Where to find your model number
- Breville: On the rating plate under the machine; the model starts with "BES", "BKE", "BOV" etc.
- Sage: Usually on the rating plate under the machine or behind the water tank.
General manufacturer guidance: exact label position can vary by model.
Grouphead Gasket specifications
- Material
- Silicone / Silica gel
- Size
- 54mm
- Temperature Range
- -65°F to 450°F (-54°C to 230°C)
Installation guide - Replacing a group head gasket
General guidance for this part type - always follow your device manual- Plastic pick or small flat screwdriver
- Brush and damp cloth
- A light smear of food grade silicone grease helps the seal seat.
- Still leaking: the groove may be scaled; descale and refit.
- 1Switch off and cool. Turn the machine off, unplug it and let the group head cool completely.
- 2Remove the shower screen. Undo its center screw (if present) and lift it off.
- 3Remove the old gasket. Pry it out with the pick, working round the edge; hard old gaskets may come out in pieces.
- 4Clean and fit. Scrub coffee residue and scale out of the groove, then press the new gasket in evenly with its flat side as the old one sat, and refit the shower screen.
- 5Test. Lock in the portafilter (it may feel stiff at first) and run water to check for drips round the seal.
Read the full guide: How to Replace an Espresso Machine Gasket or O-Ring →
This is general guidance for the part type, not a model-specific procedure. If the part does not fit without force, stop and recheck compatibility.
Maintenance check
Signs it's time to replace
- 01Water or coffee leaks around the seal
- 02Rubber is hard, cracked or flattened
- 03Loss of pressure or poor seal
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FP-578E5212 month warranty on every part
Every part we sell is covered for 12 months from delivery. If it fails in normal use, we replace it or refund you , claim it straight from your order page.
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Questions & answers
+Which models does this grouphead gasket fit?
Our team verified it for Breville 860, Breville 810, Breville 840, Sage 500, Sage Barista Express BES860, Sage Infuser BES840 and 6 more. The full list is in the compatibility table above.
+How do I make sure it fits my exact model?
Find the model number on your device label and compare it with the table above. Our fit guarantee covers verified models.
+What's in the box?
Pack size: 1-pack, as listed for this part. Check the photos and specifications for the exact contents.
+What is the grouphead gasket made of?
Listed material: Silicone / Silica gel.
+What are the dimensions?
Listed size: 54mm. Measure your old grouphead gasket to compare.
+Is it hard to install?
Install difficulty: Moderate · basic hand tools. Step by step instructions are on this page.
+How fast will it arrive?
US orders arrive in 7 to 15 business days with free shipping. Other countries are shown at checkout.
+Is there a warranty?
Yes, a 12-month warranty is included, and you can extend it at checkout. Returns are accepted within 30 days.