What is the primary responsibility of the plumber concerning water supply?

The primary responsibility of a plumber concerning water supply is to protect the water supply from backflow. Backflow occurs when water flows in the opposite direction from its intended flow, which can lead to contamination of the potable water supply. Plumbers are trained to implement various backflow prevention methods and devices to ensure that clean drinking water remains safe from pollutants or contaminants that could be introduced from various sources, such as drainage systems or plumbing fixtures.

While installing water heating systems, ensuring proper drainage, and maintaining sewer systems are important tasks within plumbing, they are secondary to the fundamental duty of maintaining the safety and integrity of the water supply. Protecting against backflow is crucial for public health and safety, making it a priority in plumbing practices and regulations.