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[[Image:WaterPurifier.jpg|thumb|right|200px|A WaterPurifier being used]]
The WaterPurifier is a water treatment system that can be installed in rural areas. The unit removes all pathogens and produces clean and safe drinking water without external use of electricity or chemicals.
The WaterPurifier is different from other water purification systems because, it only needs sunlight to operate and the unit creates disinfectant that provides residual chlorine, thus preventing recontamination. It can be used everywhere. It is extremely robust, compact, and easy to transport. It helps organizations in developing countries.
===Suitable conditions ===
The WaterPurifier is not designed to remove turbidity or chemical contaminants.
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! width="50%" style="background:#efefef;" | Advantages
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| valign="top" | - Good quality of water. <br>
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===Operations and maintenance===
The WaterPurifier is very easy to operate. One main switch will switch the unit in operation ready mode. If you tap the purified water the disinfection will start immediately. If you stop tapping water the disinfection is switched off. To generate enough pressure for the filtration process, water has to be kept in the barrel above the unit. Water pressure results in clean water. If the water barrel is empty a LED alarm light will warn you.
The estimated lifespan is 20 years if well maintained. The membranes and the electrodes have to be replaced after 5 years.
===Costs===
{{Treatment_Cost2
|CapCost= € 1.800
The estimation is based on the 600 litres/day unit. The cost per litre of treated water in this case is calculated over 20 years. With 3 times replacement of membrane & electrodes. Operating cost includes salary of 1 operator, assumed to be working 1 day per week based on average annual GNI per capita in third world countries of €500 fulltime (World Bank).
===Field experiences===
At the moment The WaterPurifier have sales representatives in The Netherlands, Kenya, Dominican Republic, China and Egypt.
===Acknowledgements===
To order a WaterPurifier unit from the Netherlands manufacturer: [http://waterforeveryone.nl/waterpurifier/waterpurifier-500uv WaterForEveryone.nl].