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Wasol is currently a leading contractor in the design and installation of Demi system. With over 15 years of experience in the water treatment industry in Vietnam. We provide comprehensive solutions from consulting, design, installation to operation and maintenance, meeting the stringent standards of industries such as electronics, pharmaceuticals and healthcare, food and beverage, steel coating, chemicals, and more.
Wasol is committed to delivering high-quality DEMI system that operate reliably, save energy, and are cost-effective—enhancing production efficiency and promoting the sustainable development of our clients’ businesses.

What is a DEMI (DI) Water System?
The DEMI system (also known as DI – Deionized Water System) is a specialized water treatment system that uses ion exchange or membrane filtration methods to remove all mineral and ionized salts—both organic and inorganic—in order to produce high-purity water.
By eliminating electrically conductive ions from the water, the output from a DI system achieves extremely low conductivity, meeting strict water quality requirements in production processes. This is especially critical in industries that demand high-purity water to ensure product quality and extend the lifespan of equipment.

Applications of DEMI (DI) Water Systems
The DEMI (DI) water system is widely applied across various industrial sectors that require stringent quality standards. Below are some key applications:
Pharmaceutical and Medical Industry:
Used in the production of medicines and medical devices where water must be free from any impurities that could affect product quality and treatment efficacy.
Food and Beverage Industry:
Ensures that water used in food processing, beverage production, and ingredient mixing is completely safe and free from contaminants.
Electronics and Semiconductor Industry:
Demi system is used to clean circuit boards and components, leaving no mineral residues on surfaces, thereby enhancing the precision and durability of electronic devices.
Laboratories:
Demi system is essential for conducting accurate experiments, preparing standard solutions, and avoiding unwanted reactions caused by trace ions in regular water.
Other Industries:
Demi system is also utilized in other industries such as chemical manufacturing, precision engineering, cosmetics, electroplating, and steel coating.
Why Choose Wasol as Your EPC Contractor for DEMI (DI) Water Treatment Systems?
Vietnam’s Leading Water Treatment Expert
With nearly 15 years of experience in water treatment, Wasol has established itself as one of Vietnam’s top EPC contractors, especially for high-standard technical projects such as Demi (Deionized) Water Systems. We understand that DI water must not only meet strict quality requirements but also ensure long-term stability and operational efficiency.
Wasol has successfully delivered numerous large-scale projects both domestically and internationally, with a deep understanding of the specific needs of industries such as pharmaceuticals, electronics, and food & beverage. Every DI system designed and installed by Wasol comes with a strong commitment to quality excellence and post-handover reliability.
Tailored Technical Solutions – Optimized for Each Customer’s Conditions
Every Demi system is custom-designed to suit the specific needs of each client, ensuring technical integrity, cost-effectiveness, operational stability, ease of maintenance, and future scalability. We focus on compatibility and adaptability to help customers expand capacity effortlessly when needed.
Proven Quality & Trusted Reputation
Wasol has designed, installed, and handed over numerous DEMI/DI systems across the country. These systems have been operating smoothly and reliably for years at many well-known factories. Today, Wasol is a trusted strategic partner for many clients across various industries.
Our DI systems incorporate equipment from globally recognized and reputable manufacturers, ensuring high durability, stability, and performance.
A Team of Professional and Experienced Engineers
Wasol’s team of engineers and technical specialists are highly skilled and dynamic. Our experts bring years of experience from leading multinational corporations, delivering innovative and efficient solutions that ensure both technical excellence and cost optimization for our clients.


Contact Us for Consultation – Wasol, Your Trusted EPC Contractor for DEMI (DI) Water Systems
Let Us Help You with What We Do Best
For more information, please feel free to contact us via the following channels:
📞 Hotline: 090 668 8934 – 0283 961 0884
📧 Email: info@wasol-vn.com
🌐 Website: wasol-vn.com
🏢 Office Address: 57/14-16 To Hieu Street, Hiep Tan Ward, Tan Phu District, Ho Chi Minh City, Vietnam