E-Rotek Water Systems Co., Ltd. is a complete water treatment solutions provider for residential, commercial, and industrial applications. Founded in the year of 2000, we have multiple well-established partners worldwide and clients in over 30 countries using our services to provide innovative and efficient pure water solutions. Our engineering design emphasizes low life cycle cost with high quality standards and responsive service support.


Our years of hands-on experience enable us to provide innovative and cost effective purified water solutions. We pride ourselves on providing clients with the lowest

life cycle costs, the highest quality and the most responsive service in the water treatment industry. We have products, technology, experience, and knowledge to support your needs. Our attention to detail has made ROTEK a leading manufacturer and distributor in this industry.


ROTEK provides a complete offering of products to address all water treatment applications from point of entry (POE) to point of use (POU). ROTEK uses a variety of water purification technologies including:


  • Reverse osmosis (RO), Ultrafiltration (UF), and Nanofiltration (NF)

  • Media filtration, water softening and chemical dosing

  • Electro-deionisation and resin based ion exchange

  • UV and Ozone sanitation systems


At ROTEK, we offer extensive technical and customer support from applications engineering to technical on-site troubleshooting. When you purchase ROTEK products, you can trust that we are just a phone call away.


A Single Source Supplier

Our broad range of water and wastewater treatment systems enables you to access one or multiple technologies for integration into a total water treatment solution specific to your feedwater source and application.


Global Sourcing

As a designer, manufacturer, and supplier of water and wastewater treatment systems and services worldwide, we have developed a global sourcing network that can deliver maximum value through the elimination of non-value-added expense.


Flexible OEM/ODM Service

We believe that standard products are not always able to meet our customer's demands. To best serve those needs, ROtek has an extensive OEM/ODM service where you can access our custom design service and see the project through to production with the help of our specialized team.



ROtek use only the best available components in all our systems to ensure long operating life and reliability.  Wherever possible we use globally supported components in industry standard formats to give maximum choice of using new developments in membrane and filtration technologies as they become available.  We have developed a specialized surface modified reverse osmosis membrane for groundwater treatment as part of our ongoing R&D process and continue our research to improve all ROtek systems to give you the best possible solution.



ROtek water treatment systems are designed with a minimal footprint to ease installation space.  Systems are fully engineered with corrosion resistant stainless steel frames, high pressure rigid pipework, stainless steel braided flexible hose, and high pressure membrane pressure vessels. 



ROtek reverse osmosis systems provide the highest efficiency possible for conversion rates and power consumption.  Larger systems may be fitted with variable speed controllers for the high pressure pump to reduce energy consumption