This depends on frequency of use, water quality and the grade of ceramic candle in your system. The following guideline for replacing the various ceramic grades:
The Sterasyl water filter candle Should be replaced once cleaning fails to restore the water flow. However, we usually recommend that Sterasyl® candles are replaced after 12 months or 10,000 litres of water have passed through the candle, to guarantee optimum performance.
In combination filter elements (ceramic shells containing other types of filter media) cleaning the ceramic will not extend the life of the internal material. For example, the ‘life’ of the carbon block in Supercarb® elements is determined by the concentration of chlorine and/or chloramine and/or volatile organic compounds in the water supply. The particulate and turbidity concentration in the water supply govern the life of the ceramic. This means that the life of the ceramic might or might not exceed the capacity of the carbon insert, depending on the water quality. Whichever point is reached first – the six months usage or the ceramic becoming blocked to the extent where cleaning does not restore the flow – governs when the filter element requires replacing.In most cases, the Super Sterasyl water filter element should be replaced after 6 – 12 months of daily use. The following flow guidelines can be used to guarantee optimum performance:
Super Sterasyl® 2,000 litres
After this amount of water has passed through the filter element, the filter will need to be replaced to guarantee optimum performance.