BS8558 Building & Mains Chlorination Services

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Innovative Legionella Control Solutions & Water Treatment Services


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What is BS 8558 Chlorination?

BS 8558:2015 is the British Standard that outlines best practices for the design, installation, commissioning, and maintenance of water supply systems. It includes guidance on the chlorination of new or altered water systems to prevent the growth and spread of harmful bacteria such as Legionella, E. coli, and other waterborne pathogens.

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Expert Water System Chlorination in Compliance with BS 8558 Standards

Ensuring the safety and hygiene of a building’s water system is a critical part of construction, commissioning, and facility maintenance. We specialize in BS 8558-compliant building and mains chlorination, delivering professional, certified disinfection services for domestic, commercial, and industrial properties.

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When is Chlorination Required?

BS 8558 chlorination is typically required in the following cases:

  • New water mains installation

  • Extensions or modifications to existing pipework

  • Before occupation of newly constructed buildings

  • Following maintenance or repairs to the water system

  • If contamination is suspected or confirmed

What Legionella Services are there?

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Legionella Risk Assessment

TMV Servicing

Legionella Remote Monitoring

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Legionella Testing

Expansion Vessel Flushing

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Legionella Remedial Works

Water Safety Signs

Legionella Free Legionella Audit

Legionella Monitoring

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Legionella Testing Kit

Pump Servicing

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Our Chlorination Process

Our certified engineers follow a systematic chlorination process to ensure the highest hygiene standards:

  1. Initial Inspection & Risk Assessment
    Site evaluation to determine the scope of chlorination and appropriate chemical dosing.

  2. System Flushing
    Removal of debris, sediment, and stagnant water through thorough flushing.

  3. Chlorine Dosing
    Injection of approved chlorine solution at prescribed concentrations in accordance with BS 8558 guidelines.

  4. Contact Time Monitoring
    The chlorinated water is left in the system for a set duration to ensure effective disinfection.

  5. Neutralization & Final Flushing
    After contact time, chlorine is neutralized and the system is flushed with clean water.

  6. Microbiological Sampling (Optional/As Required)
    Water samples are taken and sent to an accredited laboratory for testing, if requested.

  7. Certification & Documentation
    On successful completion, we provide a full chlorination certificate and detailed service report for compliance records.

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How Can We Reach You

How to Get Started with Flowsafe

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Get a Quote

Receive a quote from our Customer Service Team.

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Secure Booking

Make payment to secure your chosen date and time.

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Your Appointment

30min curtesy call for engineer's arrival time.

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Report Delivery

Quality checked and emailed within 24hrs.

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Legionella Training

Regular legionella awareness training.

Leading Legionella Services & Trusted Water Treatment Experts in the UK

Flowsafe Compliance Water Hygiene Services is built on over 10 years of personal industry experience, delivering trusted water treatment solutions for homes and businesses across the UK.

With a strong focus on quick response, reliability, and tailored service, we offer expert Legionella control and water hygiene solutions designed to ensure safe, clean water where it matters most. Our approach is hands-on, professional, and fully aligned with current industry standards and regulations.

Combining deep technical knowledge with a customer first mindset, Flowsafe Compliance Water Softeners provides dependable water quality solutions helping you protect your property, maintain compliance, and support overall health and well-being.


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