Gasket and shower screen

The seal and screen under the group

A maker job: the manual's "Using the Allen key" (UK guide: "Using the hex key"). One centre screw holds the stainless shower screen; the silicone seal sits round it.

When: "Over time" (the manual). The manual lists a worn seal as a cause of coffee running out round the portafilter. Owners change it about yearly.

Parts: seal SP0025526 (was SP0001474), screen SP0001475, screw SP0001476. Breville gives no seal sizes beyond 54 mm.

Screw, screen and seal out

The manual's steps, with the machine cold.

1. Press POWER to switch off and unplug.
2. Take out the tank and the drip tray.
3. Clean the coffee out of the centre of the screw with a skewer.
4. Put the short end of the hex key in the screw and turn it anticlockwise to loosen.
5. Take out the screw and the screen and note which side of the screen faces down. Wash and dry the screen.
6. Pull out the old seal with your fingers or long-nose pliers.

New seal, back together

The manual's steps, with one owner tip at the end.

1. Fit the new seal flat side first, so the ribbed side faces you.
2. Refit the screen the same way up as it came out.
3. Start the screw by hand for 2 to 3 turns.
4. Tighten it with the key until it is flush with the screen. Do not overtighten.
5. Refit the drip tray and the tank.
6. Lock the empty portafilter in to seat the seal (Hoon's Coffee, owner).

Breville / Sage Barista Express: every job