Is it necessary to change the pre-filters on my system every 4 months?

Yes. This will be scheduled and carried out by our technicians as part of our annual maintenance. Our systems are designed to operate best to give high quality purified water with normal routine maintenance. Regular filter change is required to avoid deterioration of filter performance and bacteria growth within the filter media caused by clogged pre-filters and long-term usage. Your local water conditions may also necessitate more frequent filter changes.