After a repair in a water treatment system, which components must be disinfected by the technical staff?

The focus on disinfecting the reverse osmosis (RO) system, distribution system, and holding tank following a repair in a water treatment system is crucial for ensuring the safety and quality of the treated water. The RO system is instrumental in purifying water by removing impurities, and any contamination that may have occurred during repairs could compromise its effectiveness. Disinfecting this component ensures that it can function properly and maintain water quality.

Similarly, the distribution system is responsible for transporting the treated water to its final destination. If this system is not properly disinfected, harmful microorganisms could proliferate, posing a risk to users. The holding tank, which stores treated water before it is distributed, must also be sanitized to prevent any potential contamination during maintenance or after repair processes.

In contrast, the other options involve components that, while important in the overall water treatment process, may not require immediate disinfection under the same circumstances. For example, valves and pumps can often be cleaned and inspected without necessitating a full disinfection process unless they come into direct contact with water or are identified as being compromised during repairs.