Under-sink water purifiers usually consist of a pre-filter, a reverse osmosis membrane, and a post-filter, all installed under the kitchen sink. Pre-filters remove sediment, chlorine, and other contaminants that can affect the taste or odor of the water. The reverse osmosis membrane is the heart of the system as it removes up to 99% of impurities including lead, bacteria, viruses and other harmful substances. An after-filter then adds some healthy minerals and improves the taste of the water. Water Filter System For Sink, Bottleless Water Cooler , Cold Water Machine , Water Cooler Filter ,Commercial Reverse Osmosis . As a leading manufacturer, we have over 30 years of experience in producing. From small household filters to light commercial grade systems, we have solutions to meet different needs and preferences. The product will supply to all over the world, such as Europe, America, Australia,Costa rica, Milan,El Salvador, Belgium.Hydration is vital to our overall health and well-being, and in the workplace it takes on an even greater role. Angel office water coolers with built-in water filters, making drinking water in the workplace both convenient and safe.