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020 4532 7773When installing a new water system in Brentford or greater London, chlorination isn’t just an option—it’s a regulatory and public health necessity. Bacteria such as Legionella, E. coli, and Pseudomonas can thrive in unclean pipework, especially during construction or after periods of inactivity. That’s why London Water Treatment provides specialist new water system chlorination services tailored to developers, contractors, engineers, and property managers seeking fully compliant, expertly executed disinfection solutions.
We strictly follow the L8 Approved Code of Practice (ACOP) issued by the HSE and the BS8558 standards, ensuring your water system is not only safe for human use but also legally compliant. Whether it’s a residential complex, a hospital, a commercial office, or a hotel development, our team delivers meticulous chlorination services that are efficient, certified, and cost-effective.
Newly installed pipework may appear clean—but appearances can be deceiving. During installation, foreign materials such as dust, flux, biofilm, oils, and construction debris often enter the system. If not cleaned properly, these contaminants can become breeding grounds for dangerous microbes, threatening public health and potentially leading to legal liability.
Don’t let an oversight in chlorination delay your project or put people at risk. London Water Treatment ensures your water systems meet all required health and safety standards.
The L8 ACOP is the UK’s primary code for managing Legionella risk in water systems. Issued by the Health and Safety Executive (HSE), it places a legal responsibility on duty holders to ensure water systems are free from bacterial contamination.
At London Water Treatment, our chlorination services are engineered to fully align with L8 ACOP, giving you:
BS8558 is the British Standard that provides guidance on the design, commissioning, and maintenance of domestic water systems. It's the definitive guide for cleaning, disinfecting, and testing new or altered systems before bringing them online.
Our team uses this standard to:
Adhering to BS8558 ensures our chlorination services not only meet industry norms but also exceed the expectations of building control and local authority inspections.
Wondering if your project requires chlorination? You’re not alone. Here’s when chlorination is typically needed:
| Situation | Chlorination Required? |
|---|---|
| New building with newly installed pipework | ✅ Yes |
| Major plumbing refurbishments or extensions | ✅ Yes |
| Temporary or dormant system reactivation | ✅ Yes |
| Routine maintenance | ⚠️ Sometimes (depends on risk assessment) |
| Commissioning a booster set, cold water storage tank or calorifier | ✅ Yes |
London Water Treatment offers on-site assessments to help determine if chlorination is necessary and how best to carry it out in line with L8 and BS8558.
We work with a wide variety of professionals across the Brentford and Greater London area:
If you’re commissioning any type of water system—from a school science block to a hospital water main—we ensure it’s chlorinated, safe, and certified.
We follow a proven, professional, and fully traceable process:
1. Site Evaluation: We assess your system layout, materials, age, and flow dynamics to create a chlorination plan.
2. System Flushing: We flush the system using potable water to remove any loose deposits or contaminants.
3. Disinfection Dosing: The system is dosed with chlorine solution at BS8558-specified concentrations.
4. Contact Time: We allow the disinfectant to circulate and remain in the pipework for a set period (1–24 hours).
5. Final Flush: After the contact period, we flush the system again with clean water until chlorine levels return to background.
6. Microbiological Sampling: We take post-chlorination samples and send them to a UKAS-accredited lab for analysis of:
7. Certification & Handover: You receive a full certificate of disinfection, microbiological report, and compliance documentation for your records and building control.
Recently, we were contracted to chlorinate the water system of a newly developed 200-flat residential scheme in Brentford. The site included:
Challenges: Tight turnaround, zero room for delays, and multiple contractors working simultaneously.
Our solution: We deployed a team of two chlorination engineers and completed:
Result: Successful compliance, no retests, and a happy developer ready to proceed with handover.
We’re not just another water hygiene contractor. We’re compliance experts, customer-focused, and committed to safety.
✅ Local Brentford Presence: We’re based in and around West London, with rapid response teams ready to mobilize.
✅ Full Certification: All work is carried out in line with L8 ACOP and BS8558, with supporting documentation.
✅ Experienced Engineers: Our chlorination specialists have decades of combined field experience.
✅ Competitive Pricing: Our quotes are fair, transparent, and customized to your system size and complexity.
✅ Flexible Scheduling: We work evenings, weekends, and holidays to minimize disruption to your build schedule.
✅ End-to-End Support: From system evaluation to retesting (if needed), we’re with you every step of the way.
Q1. How long does chlorination take?
Ans: Most standard systems are chlorinated and flushed within one working day. Larger or more complex sites may take up to 48 hours.
Q2. Is chlorination harmful to the environment?
Ans: We use safe, biodegradable chemicals and always flush systems into approved drainage routes. Our methods follow all environmental health guidelines.
Q3. Can I get documentation for building control?
Ans: Absolutely. You’ll receive a disinfection certificate, lab results, and chlorination report, ready for presentation to your local authority or handover team.
Q4. What if the system fails the test?
Ans: If post-chlorination samples fail, we’ll investigate the cause and re-chlorinate at no extra charge, ensuring you pass the second time.
London Water Treatment offers more than just chlorination — we offer confidence. Confidence that your water system is clean, compliant, and ready for safe operation. From initial consultation to final certification, our team works tirelessly to meet L8 ACOP and BS8558 standards in everything we do.
If you’re building, renovating, or managing a facility in Brentford, don’t leave water safety to chance. Choose the chlorination experts that London trusts.
