Building Internal Chlorination
As a leading expert in Legionella management, HTS is fully equipped to handle all aspects of chlorination services to control the spread of legionella control and as part of the commissioning package
Our team has a strong, proven track record across various sectors, including construction, Education, Healthcare, Housing, Facilities Management, and the retail industry.
What is an internal chlorination?
Internal chlorination is a process used to disinfect water systems, such as
pipes, water tanks, and process systems, by introducing chlorine (sodium
hypochlorite) to kill harmful bacteria, including Legionella.
This method is typically used to ensure water systems are free from microbial
contamination, maintain hygiene standards, and comply with health and
safety regulations. Chlorine is added to the system in a controlled manner,
allowing it to circulate and disinfect all parts of the system. After the
treatment, the chlorine levels are neutralised and monitored to ensure safe
water quality.
A chlorination certificate provides documentation that a water system has been properly disinfected through chlorination. It typically includes the following details:
1. System Information:
– Description of the water system that was disinfected (e.g., type of system, location, and purpose).
2. Chlorination Details:
– Chlorine concentration used during the disinfection process.
– Duration of chlorination (how long chlorine was allowed to remain in the
system).
– Date the chlorination was carried out.
– Method used for chlorination.
3. Test Results:
– Before and after chlorine levels to confirm the effectiveness of the
disinfection.
– Sampling and analysis results to demonstrate the system is free from
harmful bacteria.
4. Compliance:
– Confirmation that the chlorination process complies with relevant regulations, such as WRAS or BS 8558.
– Any additional recommendations or required actions, if applicable.
5. Signed by the Contractor:
– Name and details of the contractor or company who performed the
chlorination.
– Signature of the person responsible for carrying out or overseeing the
process.
This certificate serves as proof that the water system has been properly disinfected and is safe for use.
FAQs
Internal chlorination is a process used to disinfect water systems, such as pipes, tanks, and cooling towers, by introducing chlorine to kill harmful bacteria, including Legionella. This method is typically used to ensure water systems are free from microbial contamination, maintain hygiene standards, and comply with health and safety regulations. Chlorine is added to the system in a controlled manner, allowing it to circulate and disinfect all parts of the system. After the treatment, the chlorine levels are carefully monitored and adjusted to ensure safe water quality.
Chlorine (Cl) is a chemical commonly used as a disinfectant due to its strong ability to kill bacteria, viruses, and pathogens. It’s widely used in water treatment (e.g., drinking water, swimming pools), disinfection of surfaces, and wastewater treatment to ensure water safety and hygiene.
Chlorination is often required for new water system installations; to disinfect the system and ensure it is free from harmful bacteria, including Legionella. This process helps eliminate any microbial contamination that may have occurred during installation, ensuring the water system is safe for use. It’s typically required by regulations like the Water Fittings Regulations 1999 (WRAS) and BS 8558, which mandate disinfection procedures for new or modified water systems before they are commissioned.
A chlorination certificate includes details of the disinfected water system, chlorination method, chlorine concentration, duration, test results (before and after chlorination), compliance with relevant regulations, and the contractor’s details and signature, confirming the system is safe for use.
Several regulations govern the management and control of Legionella and
water hygiene, including internal chlorination, such as:
The Health and Safety at Work Act 1974, which mandates employers to ensure the safety of employees by managing Legionella risks
The Control of Substances Hazardous to Health (COSHH) Regulations 2002, requiring risk assessments and precautions for hazardous substances
The Control of Legionella Bacteria in Water Systems (ACOP L8), offering guidance on risk assessments and control measures like chlorination
The Water Fittings Regulations 1999 (WRAS), which govern safe water system installations
The Health and Safety Executive (HSE) Guidance (HSG274), which provides best practices for water system disinfection and British Standard BS 8558, which offers guidelines for designing, installing, and maintaining water systems to prevent Legionella, ensuring public health and safety.
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