Leaking Through Shower Screen
Scenario 1: Leak only occurs after pulling a shot
Scenario 2: Leak occurs when there is pressure in the boiler, even before pulling a shot
Scenario 1: Leak only occurs after pulling a shot
This is likely just residual water sitting above the shower screen that drips out slowly. To clear it, gently pump the lever up and down without opening the brew chamber—this will flush the water away. We recommend doing this both before starting a shot and after finishing, as it also helps improve the air bleed.
See this technique demonstrated below (3:00 mark)
Scenario 2: Leak occurs when there is pressure in the boiler, even before pulling a shot
When the piston is in its resting position, its gaskets form a seal between the grouphead and boiler. This prevents pressurized water from flowing through the shower screen.
If water is coming out of the shower screen when the piston is in its resting position, then keep reading for potential issues / solutions.
1. One or more piston gaskets are torn or worn.
To check, remove the piston from the grouphead and carefully inspect each gasket for damage.
If you're unsure, send photos of your piston to support@odysseyespresso.com and we'll help assess the condition.
⚠️ Causes of premature wear:
- Not using enough Molykote or equivalent food-safe grease on the piston gaskets
- Insufficient maintenance interval leading to excessive coffee debris around the piston gaskets
- Gasket tearing during piston installation if it catches on a sharp edge of the grouphead
Your Argos will come with a spare set of Piston Gaskets
🛒 Order Spare Piston Gaskets
2. The lower most piston gasket is flipped the wrong way
Note that the widest part of the lowest gasket is pointing upwards - this is the correct orientation of this gasket. Assembling it upside down can lead to leaks through the shower screen when the boiler is up to temperature

3. The piston linkage has not been assembled correctly
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Do:
- In Direct Configuration, thread the chicago bolt through the lower hole of the piston linkage.
Don’t:
- Thread the bolt thorugh the upper hole in Direct Configuration. This causes the piston to sit too high, which allows water from the boiler to enter the grouphead when the piston is at rest.
 
 | Correct assembly for Direct Lever configuration: The brew chamber only opens to the boiler when the lever is lifted to approximately this height. | Incorrect assembly of for Direct Lever configuration: The brew chamber will open to the boiler when the lever is lifted to this height. | 
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