What is the first step when a new section of water main has just been laid?

The appropriate first step when a new section of water main has just been laid is to conduct a pressure test. This process is crucial because it ensures that the new pipeline is free from leaks and can withstand the desired operational pressures. The pressure test is typically performed before any water is introduced into the system to verify the integrity of the pipe and its joints.

Conducting a pressure test helps identify any weaknesses in the construction or installation work of the water main. If any leaks or failures are detected during this test, they can be addressed immediately before proceeding to disinfect or flush the line.

Once the pressure test has confirmed that the main is secure, additional steps such as disinfection, flushing, and collecting bacterial samples can be carried out in the proper sequence to ensure that the water quality is safe for distribution.