Deionized Water

An industrial deionized water system that takes di water to a whole new level: 18.2 Megohm to be precise

An industrial deionized water system can help improve operating costs, increase ROI, comply with an industry standard, reduce downtime and more. But not all di water systems are created equal.

Deionized Water System

Total Water’s deionized water system design achieves 18.2 megohms resistivity, while others in the industry reach 10 megohms. It allows us to deliver DI water that meets the most stringent protocols.

What is deionized water (di water)?

For water to become deionized, all of its charged ions must be removed. This results in water in its purest form. The di water becomes a “blank slate” that can take on the characteristics of any solution or chemistry that is added.

In-depth article: What is Deionized Water or Di Water?

How is water deionized? And how is Total Water’s process different?

To make deionized water, all the charged ions found in tap water are exchanged for hydrogen and hydroxyl ions.  Total Water utilizes a deionization or de-mineralizing process that provides complete traceability for validated systems through our single-tank regeneration process.

Deionized water system

When we put our deionizers together, we add media (resin) to the tank. When that tank is exhausted, we bring another one out, and regenerate the exhausted tank. The single-tank regeneration process provides full traceability of each tank and guarantees our customers a consistent, high quality product.   

Some of our competitors won’t track their resin in an effort to save money. This results in different resins being mixed together, thus lowering the quality and making traceability impossible.

Why use deionized water? And why do you need such high resistivity?

The uses of deionized water span a myriad of industries, including medical, pharmaceutical, laboratory, biotech, manufacturing and hospitals. No matter what the industry, creating that true purified water “blank” slate is critical.

di water system

In the medical industry, for example, purified water is almost always used to make a liquid medical product. To ensure the product is chemically sound, the water can’t contain any types of impurities that could change the product’s chemical composition. Higher resistivity makes that possible.

Higher resistivity means the water has a high resistance to electricity.  An electrical charge cannot pass through it. The higher the resistivity, the lower the chances you’ll alter the chemical composition.  

Find Out How Our Di Water Systems Can Make a Difference for Your Operation

Get Your $99 DI Water Use Audit!

Comply with Industry Di Water Quality Standards

Every industry’s deionized water must adhere to a set of standards established by a number of professional organizations.  Total Water has extensive expertise in each of these standards areas, and works closely with governing bodies to ensure you’re in compliance.

Clinical Laboratory, Medical Research Colleges

Standard: CLRW

  • Specimen processing equipment
  • Testing equipment
  • Analyzer feed
  • BOD testing

Manufacturing – Consumer Products

Standard: ASTM (Type 1, 2, 3, 4; Bacteria Standards A, B, C), United States Pharmacopeia (USP)

  • Any liquid cosmetics
  • Shampoos and Conditioners
  • Sanitary Wipes and hand sanitizers
  • Agra-pharmaceuticals

BioTech – Pharmaceutical

Standard: United States Pharmacopeia (USP)

  • Liquid pharmaceuticals
  • Injectables
  • Oral medications
  • Cancer research products
  • Biotech research products

Hospital Water

Standard: CLRW, AAMI

  • Specimen processing
  • Laboratory
  • Humidification
  • Decontamination, Sterilization
  • Boiler Feed

Hospitals – Kidney Dialysis

Standard: AAMI

  • Kidney Dialysis

Are You Complying with Di Water Standards?

Get Your $99 DI Water Use Audit!

Frequently Asked Questions about Deionized Water

industrial deionized water system

Where can I buy deionized water?

You probably won’t see a “deionized water for sale” sign at any strip-mall. If you need quantities more than a gallon at a time, it will require the installation of a di water system.

What is the cost of deionized water?

Your overall system cost will vary based on the quantity of the DI water and quality(standard that needs to be met). DI water can normally be provided per exchange or on a cents per gallon basis. The system cost includes DI canisters and water quality equipment.

How is deionization resin used?

Deionized water resin is either used as a main treatment component or a polishing component in the water treatment system.

As we mentioned earlier, Total Water uses single-tank regeneration, so the resin is always assigned to a specific tank for traceability. This improves the quality of the di water. Some suppliers provide bulk di resin, which eliminates the traceability and lowers the purity.

In-depth article: 4 Factors that Reduce Your DI Resin Lifespan

What is the Ph of deionized water?

When you have 18 megohoms resistivity, your deionized water ph can only be 7.  “pH” is the percent of hydrogen in the water.

Can you buy a deionized water filter?

Many people think you can buy a di water filter, but that’s not the case. It’s a process, in which one ion is exchanged for another.  The process is explained in the next section.

How do you make deionized water? Is there a deionized water chemical formula?

The chemical formula for deionized water involves the exchange of the charged ions in tap water for hydrogen and hydroxl ions. Water in its purest form is hydrogen (H+) and hydroxl (OH-) ions, which form the water molecule, H2O. The process for making deionized water is explained in this post.

Does di water cause corrosion of pipes?

Pure Water measured at 18.2 Megohm is normally run through a pipe made of polypropylene or PVDF.  There is a misconception that di water cannot be corrosive to stainless steel piping.  This is incorrect, stainless steel piping will break down over time when used in high purity water systems.  As the stainless steel loses it’s passivation it begins to leach iron into the purified water stream.

What is reverse osmosis?

Larger purified water users will use reverse osmosis as a pre-treatment for their di water system.  

In-Depth Article: Could Your Business Benefit from a Reverse Osmosis Water Filter?

What’s the difference between deionized water and…

Often deionized water is confused with our types of water. Here’s how our attempt to de-muddy the water:

Deionized water vs. tap water

Deionized water is water in its purest form, while tap water contains total dissolved solids, organics, chlorine, flouride and a number of other things, depending on the municipal water source.

In-Depth Article: Deionized water vs. tap water

Deionized water vs. purified water

Di water is normally part of purified water system.

Deionized water vs filtered water 

Filtered water is more for residential use, not industrial use.

Deionized water vs. distilled water 

Distilled water is created by heating water, which becomes steam. Steam condenses back to water and cooled down, at which point it is distilled. This process removes most dissolved solids, but does not reach the high quality of di water.   

What are the components to a di purified water system?

Typical components include:

  • Water softener
  • Carbon filter
  • Reverse osmosis unit
  • Storage vessel
  • Di (deionization) system
  • Bacteria control equipment
  • High purity piping system

What should you look for in deionized water suppliers?

There are three critical elements:

  1. Location. Your supplier needs to be able to reach you quickly in the event there is a problem with your system. Service response time is critical.
  1. Expertise and service capabilities. Your suppliers should have a purified water engineer on staff, with the ability to design and troubleshoot high purity water treatment systems.

In-depth article: 8 Crucial Services Questions for di Water Quality

  1. Response time. 24 hour emergency service is an absolute must.

Are you looking for an quote on a deionized water system, or do you need help determining if your di water system meets your industry’s standards? Click on the button below to request a quote or a di water audit!

Are You Looking for a Deionized Water Supplier?

Get Your $99 DI Water Use Audit!

Related articles:

3 Little Known Threats to Your Lab’s Water Treatment System

If You Need Bacteria-Free Water, You Need Deionized Water

The Future of Water Purification for Pharma Could Be Polypropylene


We’ll do more than give you a quote—we’ll visit your site to analyze your industrial water needs.

Or call us at 877-508-8578