How the system tells you
The tap indicates remaining filter capacity as it is consumed. Treat the indicator as the primary signal: it counts actual litres drawn, while a calendar reminder only estimates them.
Signs it is overdue
- Noticeably slower filtered flow.
- A return of chlorine taste or odour.
- The capacity indicator has fully cycled.
Compatibility matters
Cartridges are not interchangeable across every system. Buying from your registered system in My GROHE Blue filters the catalogue to items that fit yours, which avoids ordering a cartridge that cannot be installed.
Replacing the cartridge
- Close the isolating valve and relieve pressure at the tap.
- Exchange the cartridge and reset the capacity indicator.
- Flush the stated volume before drinking.
