Which action is essential for minimizing Legionella risk in back-up water supply feeds to a building?

Which action is essential for minimizing Legionella risk in back-up water supply feeds to a building?

• A. Installing a valve near the building entry
• B. Flushing the line to a drain before opening the valve
• C. Both installing the valve and flushing the line
• D. Using a biocide in the back-up supply

Answer: (C)

Minimizing Legionella risk in back-up water supply feeds requires implementing multiple strategies to ensure that water quality remains safe, and the system is maintained properly. Installing a valve near the building entry allows for better control of the water supply, helping to isolate the system when necessary. This helps prevent contaminated water from entering the facility. Flushing the line to a drain before opening the valve serves as a critical step in reducing the risk of Legionella exposure. Flushing helps to clear out stagnant water, which is a favorable environment for Legionella growth, by introducing fresh water into the system. This action ensures that any potential contaminants are expelled before the water enters the building's plumbing system. Combining both the installation of the valve and the flushing of the line enhances the overall effectiveness of the risk management strategy. By doing so, the building ensures that any stagnant or potentially contaminated water is removed before being used, thereby reducing the chances of Legionella proliferation and exposure. This integrated approach is crucial for maintaining safe water systems in buildings, particularly those that utilize back-up supplies.

Minimizing Legionella risk in back-up water supply feeds requires implementing multiple strategies to ensure that water quality remains safe, and the system is maintained properly. Installing a valve near the building entry allows for better control of the water supply, helping to isolate the system when necessary. This helps prevent contaminated water from entering the facility.

Flushing the line to a drain before opening the valve serves as a critical step in reducing the risk of Legionella exposure. Flushing helps to clear out stagnant water, which is a favorable environment for Legionella growth, by introducing fresh water into the system. This action ensures that any potential contaminants are expelled before the water enters the building's plumbing system.

Combining both the installation of the valve and the flushing of the line enhances the overall effectiveness of the risk management strategy. By doing so, the building ensures that any stagnant or potentially contaminated water is removed before being used, thereby reducing the chances of Legionella proliferation and exposure. This integrated approach is crucial for maintaining safe water systems in buildings, particularly those that utilize back-up supplies.