Filter Lifespan
Coldstream FTO+ filters are designed to provide optimal filtration over a long period.
- Recommended lifespan: 1,500 liters per filter
- With 2 filters: 3,000 liters, or about 1 year of use at 8 L/day
- With 4 filters (for 9L and 12L models): 6,000 liters, or about 2 years of use at 8 L/day
Note: Coldstream FTO+ filters have been tested up to 3,000 liters, in compliance with NSF certification requirements.
Click here to view the complete filtration performance data of Coldstream FTO+ filters
Filter Replacement Calculation
To estimate when you should replace your filters:
- First, identify the size of your system (6 L, 9 L, or 12 L).
- Then consider how many times you fill it each week.
- Multiply these two numbers to calculate your weekly water consumption.
- Each filter can process 1,500 L. With 2 filters, that’s a total of 3,000 L.
- Divide the total capacity by your weekly consumption to know how many weeks your filters will last.
Example: With a 9 L system and 2 filters, filled 5 times per week:
9 L × 5 fillings = 45 L per week.
3,000 L ÷ 45 L = about 67 weeks.
If in doubt, or if you prefer simplicity, replace your filters once a year.