Skip to content 
Background
A well-regarded UK university was facing ongoing water hygiene challenges in one of its large residential blocks. The building’s age and legacy pipework contributed to persistent Legionella issues, raising serious concerns around compliance, student safety, and system reliability. With hundreds of students living on-site throughout the year, a robust and low-disruption solution was urgently needed.
The University engaged our team to deliver a safer, more sustainable solution,one suitable for educational environments where disruption must be minimal and risk kept low.
The Challenge
Traditional measures such as flushing and temperature control had failed to fully eliminate the risk. The university needed a solution that would not only tackle the root cause, including stubborn biofilm but also reduce reliance on manual chemical dosing or deliveries. Minimising operational disruption to residents was a key priority.
The Solution
After a detailed review, Genox was selected for its proven ability to generate disinfectant on-site using only salt, water, and electricity. The system provides continuous secondary disinfection, producing hypochlorous acid (HOCl), a powerful yet gentle solution ideal for controlling Legionella and biofilm within complex water systems.
Key Benefits Delivered:
• Continuous protection that targets bacteria and biofilm
• No need for hazardous chemical storage or deliveries
• Smooth integration into a legacy system with minimal disruption
• Enhanced Legionella control and system stability
Outcome & Impact
- Water sampling showed significant improvement following installation
- The estates team expressed high satisfaction with the outcome
- A key takeaway: incorporating a small water softener feeding the Genox unit ensures optimal long-term performance, especially in hard water areas