How and when do I replace the fluoride removal cartridge in my double cartridge water filter system?
a. The fluoride removal cartridge will should be replaced yearly. When replacing the cartridge, it must be flushed without the KDF/GAC filter in the system. To replace, remove the KDF/GAC cartridge, then replace the housing cover and run water through the fluoride cartridge for 10 to 15 minutes to flush the cartridge. This must be done to prevent clogging of the KDF/GAC cartridge from any activated alumina that may be released from the new cartridge. Then re-install the KDF/GAC cartridge and you can use the filter. Note: The fluoride cartridge must be installed in the first housing (countertops: where the diverter connects; under-counter systems: where the water line is connected).
