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COMBI-MIX™

Revolutionary all-in-one residential and commercial drinking water treatment

All-in-One Water Treatment

Four advanced media. One complete water treatment solution.

COMBI-MIX™ is a proprietary multi-media treatment solution developed by Watch Water® for residential and commercial drinking-water systems.

COMBI-MIX™ combines AQUARedox, ZVI-coated Catalytic Carbon, Cationix and Katalox Light in one pressure vessel. Together, these media address water hardness, iron, manganese, hydrogen sulfide, chlorine, chloramines, organic contaminants and selected heavy metals. The integrated design reduces the need for multiple separate treatment vessels while supporting both upflow and downflow system configurations. The four media have different densities and settle into distinct functional layers inside the pressure vessel. In the arrangement described by Watch Water®, AQUARedox forms the upper layer, followed by Catalytic Carbon, Cationix and the denser Katalox Light near the bottom distributor.

One vessel / Four complementary treatment technologies

COMBI-MIX Introduction

One media blend.
Multiple treatment applications.

COMBI-MIX™ is intended for packed-bed residential and commercial systems requiring several treatment processes within a compact footprint. System sizing and configuration should be based on a complete influent-water analysis, flow rate and contaminant loading.

Whole-House Water Treatment

Integrated treatment for hardness, aesthetic contaminants and selected dissolved contaminants.

Commercial Drinking-Water Systems

Compact multi-stage treatment for offices, hospitality facilities and commercial properties.

Groundwater and Well-Water Treatment

Treatment support for iron, manganese, hydrogen sulfide and hardness in groundwater.

Hardness and Scale Control

Ion-exchange softening for reducing calcium and magnesium hardness.

Chlorine and Chloramine Reduction

Catalytic carbon treatment for disinfectant residuals and associated taste and odor.

Multi-Contaminant Water Treatment

A combined treatment platform for water containing several categories of contaminants.

Four specialized media engineered into one treatment system

AR

Advanced oxidation-reduction technology

AQUARedox is designed to support oxidation-reduction processes for treating selected organic, inorganic and emerging contaminants. Its macroporous granular structure provides extensive contact between the water and active treatment surface.

CC

Adsorption combined with chemical reduction

Catalytic Carbon coated with Zero-Valent Iron combines adsorption and reduction mechanisms. It is intended to reduce chlorine, chloramines, organic compounds and selected metals while helping improve taste and odor.

CX

Efficient ion-exchange water softening

Cationix exchanges calcium and magnesium hardness ions for sodium or potassium ions. It helps prevent scale formation and supports efficient regeneration within the integrated COMBI-MIX™ system.

KL

Catalytic iron, manganese and hydrogen-sulfide filtration

Katalox Light is a manganese-dioxide-coated filtration medium designed for the reduction of iron, manganese and hydrogen sulfide. Its catalytic surface combines contaminant oxidation with physical filtration.

Multiple treatment mechanisms
inside one pressure vessel

COMBI-MIX™ brings together redox treatment, adsorption, chemical reduction, ion exchange and catalytic filtration. The media are selected to provide complementary functions within one packed-bed system.

  • Redox Treatment – AQUARedox supports oxidation-reduction reactions that transform or immobilize selected dissolved contaminants.
  • Adsorption and ZVI Reduction – Catalytic Carbon captures organic compounds while its Zero-Valent Iron coating supports the reduction of selected inorganic contaminants and disinfectant residuals.
  • Ion-Exchange Softening – Cationix removes calcium and magnesium ions responsible for hardness and replaces them with sodium or potassium ions.
  • Catalytic Filtration – Katalox Light supports the oxidation and filtration of iron, manganese and hydrogen sulfide.
COMBI-MIX Science and Technology

Explore the COMBI-MIX™
technology library

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COMBI-MIX All-in-One Solution
November 2024

COMBI-MIX™ All-in-One Solution

An introduction to the four-media treatment platform for residential and commercial water.

Four Technologies in One Vessel
November 2024

Four Technologies in One Vessel

Explore the functions of AQUARedox, Catalytic Carbon, Cationix and Katalox Light.

Multi-Contaminant Treatment
November 2024

Multi-Contaminant Treatment

A visual overview of the primary contaminant groups addressed by COMBI-MIX™.

Packed-Bed Media Configuration
November 2024

Packed-Bed Media Configuration

See how the four media arrange inside the treatment vessel according to bulk density.

Integrated Regeneration
November 2024

Integrated Regeneration

An overview of the water-metered regeneration and backwashing process.

Upflow and Downflow Operation
November 2024

Upflow and Downflow Operation

Understand the available flow configurations and system-design considerations.

Frequently
Asked Questions

Learn more about COMBI-MIX™ applications, treatment technologies, installation, regeneration and maintenance.

Contact Support
What is COMBI-MIX™?
COMBI-MIX™ is a proprietary blend of four water-treatment media: 20% AQUARedox, 20% Catalytic Carbon, 40% Cationix and 20% Katalox Light. It combines several treatment mechanisms in one vessel.
Is COMBI-MIX™ suitable for residential and commercial applications?
Yes. It is intended for residential and commercial drinking-water treatment systems. A qualified professional should size the system according to the water analysis, peak flow and daily consumption.
Which water-quality problems can COMBI-MIX™ address?
Depending on water chemistry and system design, it can address hardness, iron, manganese, hydrogen sulfide, chlorine, chloramines, organic contaminants and selected metals. Performance must be confirmed for the specific application.
How does COMBI-MIX™ soften water?
Its Cationix component exchanges calcium and magnesium ions for sodium or potassium ions, reducing hardness and helping prevent scale formation.
How are chlorine and chloramines reduced?
The ZVI-coated Catalytic Carbon uses catalytic adsorption and reduction mechanisms to decrease chlorine, chloramines and associated taste and odor.
Does COMBI-MIX™ remove iron, manganese and hydrogen sulfide?
Katalox Light is designed for their catalytic oxidation and filtration. Actual performance depends on concentration, pH, oxidation conditions, contact time and service flow.
Does the system require regeneration?
Yes. The Cationix component requires brine regeneration. The brochure specifies 80 grams of sodium chloride per litre of Cationix media. Backwashing and regeneration are managed through a suitable automatic control valve.
Does COMBI-MIX™ require backwashing?
Periodic backwashing is required to loosen and clean the media bed and remove accumulated solids. Frequency depends on water quality, system loading and pressure loss.
Can COMBI-MIX™ operate in both upflow and downflow systems?
Yes. The media are described as compatible with both configurations. The hydraulic design, distributors, control valve and media-loading arrangement must match the selected flow direction.
How much freeboard should be provided?
The published packed-bed guidance specifies approximately 70% vessel filling and 30% freeboard for the described downflow configuration. Final requirements should follow the approved system design.
What is the expected media service life?
The brochure lists an expected service life of up to five years. Actual life varies by media component, influent quality, contaminant loading, regeneration quality, operating conditions and maintenance.
Can COMBI-MIX™ replace disinfection or microbiological protection?
It should not automatically be treated as a certified disinfection barrier. Where microbiological safety is required, an appropriately validated disinfection stage—such as UV or another approved process—should be included.

Get a complete water solution

It all starts with understanding your water.

Send us your water analysis, required treatment capacity and application details. Our specialists will help determine whether COMBI-MIX™ is suitable and recommend an appropriate system configuration.

Four Technologies. One Integrated Water Treatment Solution.

Water treatment facility overview