Replace the group head gasket: Decent Espresso DE1, Decent Espresso DE1PRO and Decent Espresso DE1XL

Before you start

Tools

Decent gasket removal tool (thin dental-style pick), blind basket

Supplies

Decent silicone group head gasket (ID 57 mm, 8.5 mm thick (fits the DE1)); NBR rubber group head gasket (alternative) (ID 58 mm, 7.5 mm thick), optional

Warnings

• Do not over-tighten the portafilter, especially on a hot machine: it ages the gasket early. Source: Decent blog: Gasket removal tool & deep dive video (with summary)

Steps

1. Slip the removal tool in along the outer edge of the old gasket.

   From the manual: “Slide the gasket removal tool through the outside edge of the gasket.”

2. Push the tool upwards past the gasket.

   From the manual: “2. Push it up,”

3. Turn the tool so its tip hooks over the top of the gasket.

   From the manual: “Then rotate the tool so that the edge of the tool catches the top of the gasket.”

4. Pull downwards to draw the gasket out of the group.

   From the manual: “the top of the gasket. 4. Then pull down.”

5. Fit the new gasket with the side marked UP facing up into the group.

   From the manual: “The top side is marked UP so it's easier to know which direction to put it in for a correct seal.”

6. Lock in a portafilter with the blind basket to seat the new gasket evenly.

   From the manual: “A blind basket is used to reseat the gasket to ensure a proper seal.”

Sources

• Decent docs: How to repair guides (31. How to replace your gasket) Maker’s support page
• Decent Espresso: Gasket and removal tools Maker’s page
• Decent blog: Gasket removal tool & deep dive video (with summary) Maker’s page

Researched on 2026-09-23.

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

Applies to

• Decent Espresso DE1
• Decent Espresso DE1PRO
• Decent Espresso DE1XL