Portable DI Exchange Services (PEDI)

Portable deionization (PEDI) exchange is a service-based way to get high-purity DI water without owning regeneration equipment. Mueller Water installs charged DI exchange tanks on your site, monitors resistivity, and swaps them on schedule; exhausted tanks are regenerated and tested at our facility — no acid or caustic on site — with delivery across Texas and shipping nationwide.

At Mueller Water, we offer Portable Deionization (PEDI) Exchange Services, a crucial component of advanced water treatment processes designed to remove ionic impurities from water through ion exchange resins. Our Portable DI Exchange Services provide high-purity water solutions for various applications, ensuring optimal performance and compliance with stringent water quality standards.

What is Portable Deionization?

Portable Deionization is a water treatment process that removes ions from water by exchanging them with hydrogen (H⁺) and hydroxide (OH⁻) ions, which then combine to form pure water (H₂O). This process effectively eliminates dissolved salts and other ionic contaminants, making it ideal for applications requiring high-purity water. Our portable units allow for flexible and convenient high-purity water production on-site, ensuring uninterrupted service and minimal downtime.

Service Areas

Mueller Water’s portable DI exchange program is anchored by our Texas branches in Houston, Austin, San Antonio, and the Dallas–Fort Worth region, and we ship portable exchange tanks to industrial and laboratory customers nationwide, including cities such as Cincinnati, OH and Durham, NC. If you need scheduled DI exchange tanks delivered outside our core Texas service area, contact us to confirm logistics and exchange timing for your location.

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Our Portable DI Exchange Services Include:

  • Tailored resin formulations to meet specific water quality requirements.
  • High-capacity resins for efficient removal of cations and anions.
  • Only resin of the highest quality is selected and used in our deionizers.
  • Each lot of resin received from the manufacturer is carefully inspected to ensure performance.
  • All resins are regenerated at our Houston, Texas facility using state-of-the-art equipment and procedures.
  • All resins meet or exceed manufacturers' specifications.
  • Convenient on-site resin exchange to minimize downtime.
  • Professional and timely service by our trained technicians.
  • Flexible deployment of portable DI units to meet varying water quality needs.
  • No on-site labor cost, as Mueller technicians exchange the exhausted tanks.
  • Regeneration of our own OEM exhausted resins to restore their ion exchange capacity.
  • Replacement of resins as needed to ensure continuous high-purity water production.
  • Each exchange tank has been carefully assembled and checked before being put into service.
  • Regular monitoring of water quality to ensure optimal system performance.
  • Scheduled maintenance to prevent system failures and prolong the lifespan of DI units.
  • Same or next-day tank exchange service is standard.
  • Deionization is the most efficient process for removing dissolved salts and minerals from water.
  • Mixed-Bed deionizers provide high-quality water with a more neutral pH and are the best systems for the removal of silica and CO₂.
  • Our Mixed-Bed D.I. units are guaranteed to produce the quality of water required for any specific application, up to a maximum 18 megohm/cm resistivity at 25°C.
  • Power Generation: Essential for steam generation in power plants, preventing scale and corrosion in boilers and turbines.
  • Pharmaceuticals: Used in manufacturing processes to maintain stringent quality standards and avoid contamination.
  • Microelectronics: Ensures defect-free production of semiconductors and electronic components.
  • Chemical Production: Required for high-purity chemical reactions and product quality.
  • EV Automobile Manufacturing: Critical for cooling systems and paint shops, preventing scaling and ensuring a flawless finish.
  • EV Battery Manufacturing: Used in battery electrolyte preparation and cooling systems to maintain optimal conditions.
  • Food and Beverage Industry: Ensures the purity of beverages and food products, maintaining taste and quality.
  • Textile Industry: Prevents fabric discoloration in dyeing and finishing processes.
  • Cosmetics and Personal Care: Avoids contamination in product manufacturing, ensuring safety and effectiveness.
  • Laboratories and Research: Essential for experiments, reagent preparation, and equipment cleaning.
  • Hospitals and Healthcare: Used in sterilization, dialysis, and pharmaceutical preparations.
  • All systems are provided on a rental/exchange basis.
  • No maintenance costs are associated with the equipment.
  • The only cost incurred by the customer is the cost of the water they use.

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DI Exchange Tank Specifications

We stock a full range of portable DI tank sizes, from point-of-use cabinet units to large industrial tanks, in mixed-bed and two-bed (cation/anion) configurations. Typical capacities below are a planning guide; we size each installation against your measured feedwater so exchange intervals stay predictable.

Tank sizeResin volumeTypical capacity*Service flowTypical application
Cabinet0.5 ft³600–1,200 galup to 2 gpmPoint-of-use lab and instrument feed
Compact1.4 ft³1,500–3,500 galup to 5 gpmSmall lab / clinic, glassware rinse
Standard3.6 ft³4,000–8,000 galup to 12 gpmPlating rinse, general industrial
Large6.0 ft³7,000–14,000 galup to 20 gpmHigh-volume rinse, process water
Industrial30+ ft³Tens of thousands of gal50+ gpmCentral plant, high-flow industrial

* Capacity assumes softened, dechlorinated feed at moderate TDS. Higher-TDS source water reduces gallons per exchange roughly in proportion; mixed-bed tanks produce higher resistivity than two-bed.

Response Times & Exchange Scheduling

Tank exchange only works if you never run out of water. We build the schedule around how you actually use DI water:

  • Scheduled exchanges: routine swaps planned around your measured throughput, so tanks are replaced before resistivity drops below your specification.
  • Resistivity monitoring: each installation includes a resistivity light or monitor so you can see water quality at a glance and we can anticipate the next exchange.
  • Backup tanks on site: standard for continuous processes, so a changeout never interrupts production.
  • Rush & emergency exchange: available across our Houston, San Antonio, Austin, and Dallas–Fort Worth branches for outages or demand spikes.
  • Documented quality: every regenerated tank is tested to a documented resistivity specification before it ships back out.

How to set up a portable DI tank exchange service

Starting a portable DI (PEDI) exchange program is straightforward — here's how a new account typically gets running.

  1. Share your water specs. Tell us your required water quality (resistivity or conductivity), daily volume, peak flow, and a feedwater analysis so we can size the tanks correctly.
  2. Confirm pre-treatment. DI resin lasts far longer downstream of carbon (for chlorine) and softening (for hardness); we confirm or add the pre-treatment your water needs.
  3. Install the exchange tanks. We place charged DI tanks plumbed to your point of use, with a resistivity light or monitor so you can see water quality at a glance.
  4. Set an exchange schedule. Based on your throughput we schedule routine swaps and keep backup tanks on hand, so you never run out of DI water during a changeout.
  5. We regenerate off-site. Exhausted tanks return to our regeneration facility for chemical recharge and quality testing, then redeploy — no acid or caustic handling on your site.