What is a "leader" in plumbing?

A "leader" in plumbing specifically refers to a pipe that is designed to convey stormwater, commonly known as a rain leader or downspout leader. This type of pipe is typically used to transport rainwater from the roof or gutters of a building down to the ground or into a drainage system.

Utilizing leaders is essential in managing stormwater effectively, as they help prevent water accumulation that can lead to flooding or water damage. They often connect to a drainage system or a storm sewer that directs water away from the structure and into appropriate discharge areas, thus protecting the integrity of the building and surrounding landscape. Other types of pipes mentioned, such as those for water supply, sanitary waste, or natural gas, serve different purposes and are not classified as leaders in plumbing terminology.