How to Change the Seal of the Portafilter of a DeLonghi Coffee Maker

Aug 05, 2023, 13:02pm

The portafilter seal seals the water filter of your coffee maker.

If you find any leaks, that part needs to be replaced.

The seal is located just above the filter holder, behind the strainer or diffuser of your Delonghi coffee maker.

The portafilter seal, also known as the group gasket, in a DeLonghi espresso coffee maker is a crucial part that ensures a tight connection between the portafilter and the machine’s group head. Over time, the rubber seal can degrade and lose its elasticity, leading to leaks and a loss of pressure during brewing. Changing the seal is a common maintenance task that can be done at home. Here’s a step-by-step guide to replacing the seal of the portafilter in a DeLonghi coffee maker.

How to Change the Seal of the Portafilter of a DeLonghi Coffee Maker

Materials Needed:

  1. Replacement seal (group gasket) compatible with your DeLonghi model
  2. A set of screwdrivers (usually Phillips and flat-head)
  3. A small, dull knife or gasket pick
  4. Food-safe lubricant (optional)
  5. The user manual for your specific DeLonghi model (recommended)


Step 1: Turn Off and Unplug the Coffee Maker

Safety first! Make sure to turn off the coffee maker and unplug it from the electrical outlet.

Step 2: Allow the Machine to Cool

If the machine has been in use, allow it to cool down completely to avoid burns.

Step 3: Remove the Portafilter

Detach the portafilter from the group head by turning it counterclockwise and pulling it out.

Step 4: Locate the Seal

The seal is situated within the group head, holding the portafilter in place. It will likely appear as a rubber ring.

Step 5: Remove the Old Seal

Using a small, dull knife or gasket pick, carefully pry out the old seal. This may require some gentle maneuvering, so take your time and be careful not to scratch or damage the surrounding metal.

Step 6: Clean the Area

Once the old seal is removed, clean the area where the seal was seated, removing any old coffee grounds or debris.

Step 7: Prepare the New Seal

If desired, apply a small amount of food-safe lubricant to the new seal. This can make the installation smoother and prolong the life of the seal.

Step 8: Install the New Seal

Place the new seal into the groove where the old one was removed. Make sure it’s seated evenly and fully into place. You may use the flat handle of a screwdriver to gently press it into place if needed.

How to Change the Seal of the Portafilter of a DeLonghi Coffee Maker

Step 9: Reattach the Portafilter

Reinsert the portafilter into the group head and turn it clockwise until it’s tightly secured.

Step 10: Test the Coffee Maker

Plug in the coffee maker, turn it on, and run a test brew. Check for any leaks or inconsistencies in the flow of the coffee, and ensure that the portafilter fits snugly.


Replacing the seal of the portafilter in a DeLonghi coffee maker is a manageable task that can be undertaken with a little patience and care. It’s an essential part of maintaining the performance and longevity of your machine.

As with any repair, consult your specific model’s user manual, as there may be slight variations in design and procedure across different DeLonghi models. If you’re uncertain or uncomfortable with any part of the process, it might be best to contact a professional technician or the manufacturer’s support service.

By taking care of your DeLonghi coffee maker and performing regular maintenance tasks like replacing the portafilter seal, you ensure that the machine continues to provide rich and flavorful espresso for many enjoyable mornings to come.