When to replace the shower head
If you notice uneven saturation of the coffee bed, water spraying to one side, or visible scale buildup on the underside of the shower head that doesn’t come off with descaling, it’s time for a new one. A compromised spray pattern is one of the less obvious causes of inconsistent brews, since the rest of the machine can be working correctly while the water simply isn’t landing where it should.
How to install it
Remove the old shower head by rotating it clockwise until the arrow aligns with the open circle icon on the filter box lid, then pull it away. Fit the new one by lining up the arrow with the open circle, pressing it flush against the lid, and rotating counterclockwise until the arrow lines up with the closed circle. Fellow notes that a small amount of force is normal during removal and reattachment.
Specifications
| Compatibility | Fellow Aiden Precision Coffee Maker |
|---|---|
| Part number | 3400000401 |
| Assembly | Inner shower head + outer shower head |
| Installation | Twist-lock, no tools required |
| Genuine part | Yes, manufactured by Fellow |
What’s in the box
- Aiden replacement shower head (inner + outer assembly)



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