Lower Group Head Mushroom O-ring
US$0.62
Price when purchased online
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Sold and shipped by gorillabase.co.uk
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US$0.62
Price when purchased online
Free shipping
Free 30-day returns
Sold and shipped by gorillabase.co.uk
Free 30-day returns Details
Product details
| Management number | 248410385 | Release Date | 2026/09/03 | List Price | US$0.62 | Model Number | 248410385 | ||
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Lower Group Head Mushroom O-Ring, EPDM 04075
This EPDM o-ring seals the lower mushroom valve inside the group head, the disc that opens to let hot water reach the puck on every shot. It's a wear item, EPDM handles the heat cycling well, but the ring still hardens and loses its seal over years of daily brewing.
SPECIFICATIONS
- O-ring 04075, EPDM, 3.53 mm thick, 18.64 mm ID
COMPATIBILITY
- Fits: Group heads using the lower mushroom valve with a 04075-size o-ring
INSTALLATION
Technician-level job, the group head has to be partially disassembled to access the lower mushroom, so this isn't a five-minute counter repair.
PRO TIPS
- A failing lower mushroom o-ring shows up as water dripping from the group between shots, not during brewing, if you're chasing a group head drip and the gasket and screen are fine, this o-ring is the next suspect.
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