The frequency of filter replacement in Pure Water Technology systems typically depends on a few factors, including the specific model you are using, the volume of water being processed, and the local water quality. Generally, the recommendation is to replace the filters every six months to one year. However, if the water usage is high or if the water quality fluctuates, more frequent replacements may be necessary to ensure optimal performance and water quality. It is important to monitor the performance of your system and be aware of any changes in water taste or flow rate, as these may indicate that filter replacement is needed sooner. For the most accurate information regarding your particular model, it is best to refer to the information provided on the current Pure Water Technology website.