Service Deionization (SDI)

Convenient, cost-effective high-purity water

Evoqua Service Deionization (SDI) is a safe, convenient, and cost-effective supply of high-purity deionized (DI) water for a wide variety of applications, including boiler feedwater, laboratory water, ingredient water for pharmaceuticals, food and beverages, industrial processes, microelectronics manufacturing, and many other applications — even spot-free rinse water for car washes.

Contact Evoqua for worry-free water solutions.

Learn more about Deionized Water Systems


Count on Evoqua for cost-effective, reliable SDI
With Evoqua Service Deionization, there's no capital expenditure on costly regeneration equipment and chemicals. Evoqua replaces and regenerates your ion exchange resin tanks off-site whenever they become exhausted.

You can count on Evoqua for dependable, responsive service, with 65 customer support centers nationwide and 24/7 dispatch through a convenient service hotline. And our wide range of SDI solutions support flow rates from 0.75 to 250 GPM and resistivity from 50K to 18M Ohm.

With Evoqua's proven technology and customer support, all you have to do for a dependable supply of high-purity deionized water is turn on the tap.

Evoqua guarantees quantity and quality of your water, across many industries and applications:

Markets We Serve
Typical Applications
Evoqua Advantages
  • ​Boiler Feed
  • Local service
  • Various vessel sizes and resin forms to meet specific needs
​​Health Science / Hospital / University
  • Boiler Feed
  • Central Make-Up
  • Laboratory
  • Research
  • Polishing
  • Price - no end user system installation, chemical handling or maintenance
  • Quality sssurance - incoming raw materials must meet quality specs, recorded batch results
  • Fast local service - nationwide network of factory trained service reps
  • Controls - comprehensive document control system records all changes
  • Documentation - processed resin batch number are recorded on each deionization vessel​
Pharmaceutical / Biotechnology
  • Boiler Feed
  • Polishing
  • Purified Water
  • Laboratory
  • Research
​Food & Beverage
  • ​Boiler Feed
  • Make-Up
  • Ingredient
  • Rinse Water
Light Industry (Aerospace, Auto, Platers, Finishers
  • ​Boiler Feed
  • Make-Up
  • Rinse Water
  • Boiler Feed
  • Make-Up
  • Rinse Water
  • Polishing


​​With our full range of Service Deionization (SDI) offerings: 

​​Operating Parameters ​​
​Tank Flow Rate​0.75 GPM–  250 GPM 
Max Operating Pressure​80 PSIG – 100 PSIG (tank size dependent)
Max Operating Temperature95 – 100 degrees F (tank size dependent)
Feed Water Turbidity5 NTU
Color5 units
Organics3 mg/L
Manganese & Iron0.3 mg/L
Free Chlorine0.2 mg/L​

​Evoqua brings peace of mind to your operation: 

  • Minimum capital investment
  • No hazardous chemicals stored or handled at your site
  • Factory-trained service reps deliver, install and maintain the equipment
  • Easily adjust your deionized water capacity
  • National tank traceability

 Contact Us

Our experienced staff can help your business with all your deionized water system needs. To request more information and find the best solutions for you, please contact us.

Christopher Bailey

 About Evoqua Water Technologies

​Evoqua Water Technologies is the global leader in providing water and wastewater treatment for municipal and industrial customers. Learn mor​e.