Point of Use Water Dispenser Filtration Overview


Point of use water dispensers can use different water filter configurations while some units do not use any filtration. POU units that do not filter the water will heat or cool, and store the water directly from the city source as is. However, most units do include either a single, double or triple stage water filter system. The main types of filter cartridges used in the filtration systems are sediment and carbon filters. The carbon filters have levels of filtration ranging from 1 to .5 microns; there are filtration assemblies that can be used in conjunction with a POU dispenser that use a 0.0001 micron filter that will filter out the smallest bacteria. Multiple stage filter assemblies use multiple filters or different combinations of filters. They will use a single sediment filter, a sediment and carbon filter, a sediment and multiple carbon filters or use a combination sediment / carbon filter. Reverse osmosis is another method of water filtration used in point of use water dispensers. It is often used in conjunction with a standard filter assembly providing additional water filtration. RO filter membranes filter at an equivalent level as a 0.0001 micron filter and can remove an average of 95% of dissolved contaminants. Filtering the city water is recommended to remove particles, minerals, chlorine, and bacteria and will change the taste of the water giving the water a fresher taste.

Other types of filtration that are used on POU dispensers include ultraviolet sterilizers and ozone sanitizers. Ultraviolet sterilizers use ultraviolet light to kill bacteria in the water. This method can kill up to 99.9% of harmful bacteria and is generally used as the last stage of filtration. Water will flow around a long UV lamp and is irradiated by the ultraviolet light as it passes. The water flow is typically restricted to allow time for the light to kill bacteria. This method is recommended for areas that use well water or where the chlorination is uncertain. Ozone sanitizers produce micro-bubbles of chemical-free ozone into the reservoir killing bacteria, viruses, mold and mildew. Since ozone is an oxidizing agent and is 1.5 times more powerful than chlorine, it is a highly effective anti-bacterial agent. Because it decomposes into oxygen, it is a also a very safe filtration method.

Please contact our knowledgeable sales team to help you decided which water filter system is best for you or contact us to help you find a replacement water filter for your current point of use water dispenser.