The list below are examples of remedial actions that may be highlighted within a Legionella Risk Assessment that can be undertaken by LFS

• Blind end / Dead leg removal (redundant pipework) or other unwanted water services
• Cold water storage tank (CWST) clean and disinfection
• CWST replacement – GRP, plastic, sectional steel & galvanised
• CWST upgrade to ensure compliance with current water regulations
• Installing, repairing or replacing water heaters and calorifiers
• Installation of flow-through expansion vessels
• Installation of low-volume water heaters (above and below the sink)
• Installation or replacement of pipework, stopcocks, isolation valves, double-check valves etc.
• Installation or replacement of shower pumps/water pumps
• Installing/replacing ball valves (including delayed Action)
• Insulation of vessels / CWST & pipework, including BS pipe identification labelling
• Main’s injection disinfection
• Reconfiguration of pipework within a cold-water storage tank (improved flow pattern)
• Thermostatic mixing valve (TMV) servicing and installation

After completing a legionella risk assessment, you’ll receive a detailed report highlighting areas of concern within your water system. To reduce the risk of legionnaires’ disease, it’s essential to address these issues promptly. Corrective measures are necessary to bring your system into compliance with the Approved Code of Practice (L8), and also HSG 274 parts 1,2, and 3. In some cases, legionella testing may also be required to verify the absence of bacteria.

Legionella remedial works should be completed as soon as possible following your risk assessment to ensure ongoing safety. If the corrective measures are implemented properly, they generally only need to be done once. However, any future modifications to your water system should be reviewed by a water hygiene specialist to ensure they meet current regulations. Ongoing legionella monitoring and periodic reviews of your risk assessment are essential to maintaining a safe environment.

Legionella remedial works involve making necessary improvements to your water system to eliminate conditions that encourage legionella growth. This may include optimising system design, replacing materials, reducing water stagnation, and implementing corrective measures. Common remedial actions include:

• Removing redundant or unnecessary pipework
• Eliminating sources of nutrients like limescale
• Cleaning and disinfecting cold water storage tanks
• Insulating pipework to maintain appropriate water temperatures
• Servicing Thermostatic Mixing Valves (TMVs)