The Safe Rule
Change the cartridge at the earlier of the time limit, volume limit, or clear performance change.
If water starts tasting like chlorine again, filtration slows dramatically, the cartridge has been left unused for weeks, or the brand indicator says change, replace it.
Common Replacement Intervals
| Brand / Filter | Typical Interval | Trigger |
|---|---|---|
| Brita Maxtra+ UK | 4 weeks | About 150 litres |
| Brita Standard US | About 2 months | About 40 gallons |
| Brita Elite / Longlast+ US | About 6 months | About 120 gallons |
| PUR PLUS | About 2 months | About 40 gallons |
| ZeroWater | Varies | TDS meter reading above brand threshold |
| TAPP EcoCraft | About 4 weeks | Time-based replacement |
| Clearly Filtered | About 6 months | About 100 gallons |
Replacement Filter Shortcuts
Fresh cartridges are the easiest way to keep a jug or pitcher performing properly.