📹 Gaggia Classic Pro: Leaking Around the Portafilter When Brewing

Learn what to do if you're trying to use your Gaggia Classic Pro, but it appears to be leaking around the edges of the portafilter while it's locked in the machine.

Is it leaking from the group head, around the sides of the portafilter?

  • No: move on to the next question.
  • Yes: the group gasket needs to be replaced.

Is it spraying out of the portafilter spouts?

  • No: move on to the next question.
  • Yes: remove the filter basket from the portafilter and check to see that the two way pin is properly situated.

Gaggia Expert Tip: How to use Gaggia Espresso Machines Filter Baskets

Is the steam wand leaking?

  • Yes: Remove the knob on the steam valve. It pulls straight off like an oven knob, try closing the valve using pliers. If it closes all the way and stops leaking, inspect the plastic knob for defects, or replace the knob.
  • Yes: Are you regularly descaling the machine.
    • Attempt to run 2-3 descale cycles in a row to see if this will stop the leak. Click on the document attached at the end of this article, and watch the video below for more information on how you should decalcify and descale your machine.

How to Descale a Semi-Automatic Espresso Machine

  • If descaling didn’t stop the leak, the steam valve needs to be replaced. Follow these instructions in the video below to replace the steam valve on your machine:

How to Remove and Replace Steam Valve

Is the machine spraying or leaking from an indeterminate place?

  • If yes: remove the housing to check the pump connection, which is a white “neck” attached to a brass elbow.
    1. In the rear of the machine, use a Philips head screwdriver to remove the two screws in the black plastic cover.
    2. Lift off the housing. The black plastic and stainless steel are attached and will come off in one piece.
    3. If leaking, try using Teflon tape, food safe Permabond or food safe Loctite, all of which are available at hardware and home improvement stores, to seal the connection between the white neck of the pump and the brass elbow. Follow along with the video below for a step-by-step visual guide.
  • If no, contact customer service.

How to Replace the Pump on a Gaggia Classic

Was this article helpful?
2 out of 2 found this helpful