Chlorine tablets (calcium hypochlorite) should be used for the disinfection of newly installed water main. These tablets should be ________________.

Chlorine tablets, specifically calcium hypochlorite, are a powerful disinfectant used to ensure that newly installed water mains are free of harmful pathogens. The method of disinfection significantly impacts the effectiveness of the chlorine treatment.

The correct practice involves dissolving chlorine tablets in water first before applying them to the water main. This approach ensures that the chlorine is evenly distributed and adequately mixed with the water, which facilitates the disinfection process. When chlorine is dissolved, it becomes more bioavailable, allowing it to effectively kill bacteria and microorganisms present in the water system.

By simply sprinkling the tablets along the main or using any other method that does not incorporate dissolution, the chlorine may not adequately cover the entire surface area that needs disinfection, potentially leaving sections untreated. Additionally, storing the tablets in a bucket or trying to attach them to the sections with glue would not allow for the necessary direct contact with water needed for effective disinfection.

Thus, the correct procedure would involve dissolving the tablets in water, ensuring a thorough and even application throughout the water main to achieve optimal disinfection results.