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Equipment and Chemicals

Chlorine dioxide.

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What is chlorine dioxide?

Chlorine dioxide is an oxidising biocide widely used for water disinfection and control of legionella and biofilm in hot and cold water systems. It’s effective even where maintaining traditional temperature control is difficult, offering a safe and efficient way to protect your water network. Complii designs, installs, and maintains chlorine dioxide systems tailored to the unique demands of commercial, industrial, and healthcare environments.

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Why choose Complii?

How we can help.

Protect your people, property, and business. Here’s why we’re the right choice for chlorine dioxide.

Comprehensive dosing and control solutions

Complii provides chlorine dioxide systems designed for every type of site, from small borehole treatment plants to large-scale installations in hospitals, data centres, and industrial cooling systems. Our generators deliver precise proportional dosing and consistent disinfection performance that meets EN 12671:2009 standards.

Tailored installation and maintenance

Our specialist engineers design, install, and maintain chlorine dioxide dosing systems to suit the size, complexity, and operational needs of each site. From initial setup to regular servicing and calibration, we ensure reliable operation and complete compliance with safety and water quality regulations.

Safety-first system design

Each Complii chlorine dioxide unit includes integrated safety features such as gas escape alarms and automatic plant shutdown, supported by external LED warning beacons. These measures protect personnel and maintain compliance with the highest health and safety standards.

Real-time monitoring and reporting

Through remote data collection and our secure Cloud Connect portal, we provide off-site logging, visual dashboards, and automated alerts. Responsible Persons can monitor performance 24/7 via smartphone or laptop, ensuring early issue detection and informed decision-making.

Enhanced efficiency and peace of mind

By automating disinfection processes and minimising manual intervention, our chlorine dioxide systems reduce maintenance costs, improve operational efficiency, and support a proactive approach to water safety management. Each installation is backed by our expert support and commitment to continuous improvement.

Sector-wide expertise

Complii’s chlorine dioxide systems are used across a wide range of industries, including healthcare, education, manufacturing, food processing, and commercial property. Whatever the environment, our tailored solutions deliver consistent, compliant, and high-performance water treatment.

Your questions answered.

  • Chlorine dioxide can be applied in various environments, from hospitals and care facilities to data centres, industrial sites, and commercial buildings. It’s ideal for systems where maintaining conventional temperature control is challenging.

  • It works by oxidising and breaking down organic matter, effectively disrupting bacterial growth and biofilm formation within water systems, ensuring safe, clean, and compliant water supply.

  • Our systems feature proportional dosing technology, advanced safety controls, and remote monitoring integration. Every installation is engineered to provide consistent performance, efficient operation, and peace of mind.

  • Yes. Our engineers offer full lifecycle support, including installation, routine servicing, calibration, and remote data management, ensuring your system remains compliant and effective.

  • It’s highly soluble, stable in a wide pH range, and effective at low concentrations. Chlorine dioxide eliminates bacteria and odours without forming harmful by-products, offering a safe, cost-efficient, and sustainable solution for water hygiene management.

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Compliance with confidence.

Get in touch for a tailored quotation that fits your site’s needs.