Service life: 1,500 liters or 6 months, whichever comes first. Of course, it can be difficult to keep track of the number of liters, so we always recommend simply sticking to the 6-month interval. It doesn’t matter how many Coldstream FTO PLUS filter elements you’re using; they all need to be replaced after 6 months.
If, during those 6 months, you notice a change in the taste or smell of the water and/or a slowdown in the flow rate, this may indicate that your filters need to be cleaned. If, after cleaning, the flow rate does not increase or you still notice the same taste or smell, it is time to replace the filter elements.