Ultrafiltration is one membrane filtration process that serves as a barrier to separate harmful bacteria, viruses, and other contaminants from clean water. An ultrafiltration water system forces water through a .02 micron membrane. Suspended particles that are too large to pass through the membrane stick to the outer membrane surface. Only fresh water and dissolved minerals pass through.

The hollow fibre ultrafiltration membranes are 1.3 mm outside diameter and 0.7 mm inside diameter and are made from PVDF polymer. The fibres are strong due to a combination of PVDF polymer, an asymmetric membrane with smaller pores in the active filtration area, and a high porosity substructure.