What does a water main look like and how can it be identified in a typical urban infrastructure setting?

A water main is a large underground pipe that carries water to homes and businesses. In a typical urban setting, a water main can be identified by its size and location under the street. It is usually a large pipe made of metal or concrete, and it is often found running parallel to roads or under sidewalks. Sometimes, you may see water main access points with covers on the street or sidewalk, indicating its presence below.