Instead of producing a filter cartridge by bundling many separate strings of membrane fibres, Filtrix has come up with the concept of helically wound cartridges. These are produced out of one string of membrane and wound into a single spool. The helically wound production method not only enables a fully mechanized manufacturing process, it also provides the modules with an optimal membrane surface/volume ratio. This keeps the pressure loss over the module low and extents the service-life of the filter.

Capillary membranes are hydrophilic by nature, meaning that they tend to hold on to water, especially in low pressure conditions. This causes the problem of airlocks in the filter module, which are bound to occur in discontinue water taps like in most POU applications. This is solved by applying a membrane air release, a concept that has been patented by Filtrix.

Norit X-Flow, like Norit Filtrix also part Norit, leading in purification, is one of world's leading companies in the development and supply of innovative membrane technology to the global municipal and industrial markets. Norit X-Flow produces and supplies a wide range of standard membranes and modules for filtration and purification processes for industry, including the water sector. Norit Filtrix exclusively uses Norit X-Flow CAPFIL helically wound capillary membranes that provide an effective physical barrier to harmful waterborne micro-organisms such as viruses, bacteria, cysts and protozoa. The membranes also remove sediment and turbidity.