It is very important to replace the cartridge in a timely manner, according to the manufacturer's recommendations. Replacement cartridges have a strictly limited service life, after which they become more dangerous than useful. The frequency of replacing cartridges depends on the purity of the water and the frequency of use of the filter, as well as on the type of cartridge. You can find more information on this on the waterguides website. By following these simple rules, you can provide yourself with high-quality water with minimal costs.