This unit is effective against all protoza and larger(0.5) bacteria, utilising a 75 micron stainless steel prefilter, a 0.2 micron nominal fibreglass labyrinth depth filter, and an integral activated-carbon final stage which absorbs some chemicals, odours and tastes. Shown here with ViralGuard iodination cartridge that upgrades it to meet U.S. EPA purifier standards.