Water Chlorination & BS8558 Certification
High-precision disinfection for tanks and mains pipework. We provide the 24-hour digital certification required for water authority sign-offs and health audits.
Why Is Chlorination Essential?
Water systems can harbour hidden contamination risks. Professional chlorination ensures compliance, safety, and peace of mind.
Biofilm Growth
Sticky bacterial colonies that shield Legionella and E. coli from standard flushing.
Stagnant Pipework
Unused or low-flow systems increase bacterial risk and require controlled disinfection.
New Installations
All new mains pipework must be disinfected before connection and sign-off.
Failed Water Tests
Positive microbiological results require immediate remedial chlorination.
Professional BS8558 Disinfection
We deliver high-quality chlorination services across London and the South East, ensuring full compliance with BS8558:2015 standards.
From new mains installations to remedial disinfection following failed samples, our team ensures your system is safe, compliant, and ready for sign-off.
Our tank chlorination service includes: Removal and prevention of harmful bio-film, Removal of sediment build-ups & corrosion, Chlorination test certificate and Advice on tank performance
The H2O Comply Certificate
- 24-Hour Digital Turnaround
- UKAS Accredited Laboratory Testing
- Full BS8558 Documentation
- Accepted by Water Authorities
Our Chlorination Process
A controlled, compliant and fully documented process aligned with BS8558 standards.
Survey & Preparation
We review drawings, assess pipework layout and provide a site-specific method statement and risk assessment.
Controlled Disinfection
Chlorine dosing is carefully calculated to meet BS8558 concentration and contact time requirements.
Flush, Neutralise & Sample
The system is flushed and neutralised where required before microbiological samples are taken.
Digital Certification
Once laboratory results confirm compliance, your digital certificate is issued for authority sign-off.
Do You Have a Question About Water Tank Chlorination?
Call us today on 0800 689 3463 to discuss your requirements with our friendly team, or contact us below
Why H2O For Your Water Tank Chlorination?
Our fully-qualified plumbing, heating and water engineers have undertaken comprehensive training in water tank cleaning services, pipe cleaning and tank chlorination solutions.
We’re committed to ensuring the highest level of competence and professionalism, so we’ll always send a minimum of two water engineers to your site.
Amazing service
“Highest quality of works and very good customer service. Helped our site from tank cleans/new installs/ repairs everything we’ve needed doing they have been spot on with…even with specialist pipework no one would help us with. Always willing to go the extra mile and we wouldn’t use anyone else.”