What is the definition of a water main?

The definition of a water main refers to a primary pipe in a water distribution system that serves to transport potable water from a source to various locations, including individual properties. The correct answer emphasizes that a water main is designed to pass through and reach different parcels of property, facilitating the distribution of water to multiple users or customers.

In contrast, the other options provide alternative descriptions that do not align with the conventional definition of a water main. A pipe carrying only wastewater pertains to sewage systems and does not serve the purpose of transporting drinking water. A line used solely for irrigation signifies a specific use that does not encompass the broader function of a water main, which is focused on potable water distribution. Lastly, a water line serving only one customer points to a service line rather than a main, which typically connects to multiple service lines to distribute water in a community or geographic area.