- If possible, look for an NSF-certified ultraviolet water filter first. NSF certifies ultraviolet purifiers under NSF/ANSI Standard 55, Class A. Certification may not give you 100% guaranteed performance, but it will guarantee that the manufacture’s performance claim is true. A third-party verification of a performance is always the best assurance that you are buying a genuinely effective purification system.
POLARIS UV-24B Ultraviolet Sterilization System   | - System should have a flow rate monitoring indicator to ensure that there is no breakthrough during operation.
- Easy installation and maintenance of filters and ultraviolet lamps.
- System must provide sufficient contact time between bacteria and ultraviolet light so that the genetic material of bacteria is completely destroyed, and not just damaged. Water to be purified needs to flow uniformly in the unit for effective bacteria kill. It will be less effective if water flows too fast on one side and too slow on the other side of the compartment. Compare contact time between different purification systems.
- System must have an LED indicator to let you know how often and/or how long the light is on. The unit can become hot and difficult to maintain if light is on continuously. (Recommended duration is about 12 months or 9000 hours). Most ultraviolet disinfection systems are designed to be changed every 12 months.
- System must also have an LED indicator to monitor the lifetime of the light bulb.
- A dose alarm is also important. This alarm will alert users about water quality, operational failures, or time to change lamp.
UV purification systems can help you reduce the risk of exposure to sicknesses and diseases caused by water-borne viruses, bacteria and intestinal protozoa such as Cryptosporidium and Giardia. But it is good to be aware that the most expensive system may not be the best UV water purifier system. The less costly system may even receive the highest review ratings or be certified by NSF or an independent organization. Trojan Trojan UVMax filters (Pro 10, Pro 15, Pro 20, Pro 30, and Pro 7), eSpring , UV Pure, and some Kinetico KUV1200x are the only ones listed on NSF website as certified under NSF/ANSI Standard 55 for disinfection performance, Class A. |