Replace the portafilter gasket

Step by step

1. 1
   Confirm the leak

   If water weeps around the portafilter during a shot, the gasket is usually the cause.
2. 2
   Hook the old gasket out

   With the machine cool, use a spoon to pick the rubber ring out of the group head.
3. 3
   Press the new one in

   Wet the new gasket and press it evenly into the groove. The portafilter should lock with firm resistance, not a slam.
4. 4
   Pull a blank shot

   Run water with no coffee. The group should stay dry around the edges.

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