After the installation or repair of a water line, what treatment is recommended?

The recommended treatment after the installation or repair of a water line is to use 50mg/l of chlorine for 24 hours. This level of chlorination is effective in ensuring the disinfection of the newly installed or repaired section of the water system, as it provides enough contact time for the chlorine to kill harmful pathogens that may have entered the system during the work process.

Chlorine is a widely accepted method for disinfection in water systems due to its effectiveness against a broad range of microorganisms, including bacteria and viruses. Maintaining this concentration for a full 24 hours ensures that the chlorine has adequate time to work effectively, thereby providing a high level of assurance that the water flowing through the system will be safe for consumption.

Other treatment levels, while they may seem effective, either do not provide sufficient chlorine concentration or contact time to achieve the desired disinfecting effect, which may be necessary to ensure the safety and water quality standards stipulated by health regulations. Thus, the choice of 50mg/l for 24 hours aligns with best practices and regulatory guidelines for water system disinfection following maintenance or repairs.