What can help mitigate the risk of contamination in water systems during repairs?

Keeping the system pressurized is an effective method for mitigating the risk of contamination during repairs in water systems. When the water system is under pressure, it creates a physical barrier that helps prevent outside contaminants from entering the system through any cracks, breaks, or openings that may occur during repair work. Pressurization acts as a safeguard, ensuring that any potential contaminants cannot flow back into the potable water supply, thereby protecting the integrity of the water quality.

In contrast, using a temporary bypass might allow for continued service but does not directly address contamination risks associated with repair activities. Performing repairs only during low demand can reduce the likelihood of interruptions and the number of users affected, but it does not inherently prevent contamination risks while working on the system. Flushing the system can help remove sediments or contaminants after repairs are made, but it does not serve as a preventive measure during the repair process itself. Therefore, maintaining pressure is a proactive approach to safeguard the system against contamination.