The Puretec Z1-R filter cartridge uses advanced Ultra Z Filtration Technology to finely filter water down to 0.1 micron through a specially developed three stage process. This all-in-one cartridge provides reduction of unwelcome elements in your water such as sediment, chemicals including chlorine, bad taste, odour and also protects against cysts and bacteria such as E. coli. Enjoy peace of mind knowing you’ve got safe, purified drinking water.