Most water purifier filters are generally classified into the following three categories:

1. PP cotton filter cartridge is generally used as a primary filter cartridge in water purification equipment, mainly used to remove suspended solids, sediment, particulate matter and other impurities in water. Replacement cycle: It is recommended to replace it every 3-6 months;

2. Pre activated carbon filter is mainly used to adsorb discoloration, odor, residual chlorine, etc. in water; Post activated carbon can optimize the mouthfeel and make the water taste sweet and delicious. Replacement cycle: The replacement cycle of activated carbon filter cartridge is 6-12 months;  

3. RO membrane filter (also known as reverse osmosis membrane filter) has a filtration accuracy of about micrometers and is mainly used to filter out bacteria, viruses, heavy metal ions, organic compounds, and inorganic salts in water. Replacement cycle: The recommended replacement cycle is around 1-2 years