antibacterial hollow fiber cartridge, ideal as a safety aftertreatment for small domestic systems such as reverse osmosis or microfiltration. The antibacterial cartridge is a mechanical barrier to bacteria due to its 0.02 micron micro pores. The hollow fiber membrane does not change the characteristics of the treated water, it only retains any bacteria present. Preferable to a UV system, as operation cannot be affected by external variables (power supply, ultraviolet transparency of the quartz lamp, etc.), as well as not changing the taste and temperature of the first water dispensed. The hollow fiber membrane is not subject to periodic maintenance, it is recommended to be replaced at the first symptoms of clogging (actual loss of water flow rate).