To be installed on a hot or cold water network, these anti-impurity cartridges will be ideal for filtering solid matter or fine organic particles. Strong and resistant mesh of the coil - no fiber residue in the water. High quality wound polypropylene cartridges, they ensure effective pre-filtration of organic impurities, rust or dust in the water. These cartridges are ideal for pre-filtration, placed before your water softener, or upstream of a filtration cartridge to treat rainwater intended for watering, toilets or even your washing machine. ADDITIONAL INFORMATION: These wound filtration cartridges must be replaced at least once a year. We recommend that you use these cartridges for filtration or pre-filtration of water upstream of a activated carbon filter cartridge or ultra filtration cartridge (membrane).