How often
How often should you replace a water-filter jug cartridge?
About every 4 weeks
Jug cartridges vary. BRITA MAXTRA-style is about four weeks; some long-life cartridges claim longer. If you are unsure, four weeks is the honest default.
Signs it is worn out — save it nowSave one of these

Water filter
Every month

LAICA Bi-Flux Water Filter Cartridges 6 Pack (6 Months Supply), Prese…
Every month

ICEPURE WFC5300A Under Sink Water Filter System, 22000 Gallons Ultra …
Every 6 months
Why replace it
A jug that still pours is not proof the cartridge is working. The interval on the pack is the bit people forget.
Signs it is worn out
- Taste is back to tap
- The lid memo has gone blank in your head
- The last change was “sometime this year”
Source: BRITA UK filter FAQ. As an Amazon Associate I earn from qualifying purchases.
Also worth tracking
- How often should you replace toothbrush heads?Every 3 months
- How often should you replace electric toothbrush heads?Every 3 months
- How often should you replace a BRITA water filter?About every 4 weeks
- How often should you replace a fridge water filter?About every 6 months