Replace the group head seal: Sage Barista Express

Before you start

Tools

Allen key (supplied), skewer or similar, long-nose pliers (optional)

Supplies

replacement silicone group seal (from Sage Customer Service (size not stated))

Warnings

• Let the machine cool before you take any parts off. Source: Sage the Barista Express BES875/SES875 quick guide (UK, EN)
• Keep the power cord, plug and machine out of water. Source: Sage the Barista Express BES875/SES875 quick guide (UK, EN)

Steps

1. Switch off with POWER and pull the plug from the socket.

   From the manual: “Press the POWER button to switch the machine off and unplug the cord from the power outlet.”

2. Lift out the water tank and drip tray, carefully in case they are full.

   From the manual: “Carefully remove the water tank and drip tray, taking particular care if they are full.”

3. Pick any coffee out of the centre of the shower-screen screw with a skewer.

   From the manual: “Using a skewer or similar, clean the centre of the screw of any residual coffee.”

4. Put the short end of the Allen key in the screw and turn it anticlockwise to loosen.

   From the manual: “Insert the shorter end of the Allen Key into the centre of the screw.”

5. Take out the screw and shower screen, noting which face of the screen pointed down.

   From the manual: “Make note of the side of the shower screen that is facing downwards.”

6. Wash the shower screen in warm soapy water and dry it fully.

   From the manual: “Wash the shower screen in warm soapy water, then dry thoroughly.”

7. Pull the old silicone seal out by hand or with long-nose pliers.

   From the manual: “Remove the silicone seal with your fingers or a pair of long-nose pliers.”

8. Push in the new seal flat side first, so its ribbed face points towards you.

   From the manual: “Insert the new seal, flat side first, so the ribbed side is facing you.”

9. Refit the dispersion plate, then the shower screen, then the screw.

   From the manual: “Re-insert the dispersion plate, then the shower screen, then the screw.”

10. Start the screw 2-3 turns clockwise by hand, then tighten with the Allen key until it sits flush with the screen.

    From the manual: “turn the screw clockwise for 2-3 revolutions then insert the Allen Key to tighten until the screw is flush”

11. Put the drip tray and water tank back.

    From the manual: “Re-insert the drip tray and water tank.”

Sources

• Sage the Barista Express BES875/SES875 quick guide (UK, EN) Manual

Researched on 2026-09-23.

Published: the sentence is on the maker’s own page or in the maker’s own document.

Applies to

• Sage Barista Express