What does a leader in plumbing refer to?

A leader in plumbing refers specifically to an exterior drainage pipe that is used to manage stormwater runoff. This type of pipe is essential in directing rainwater and melting snow away from buildings and into appropriate drainage systems, such as storm drains or storage areas.

The term "leader" typically denotes its function in directing water, which helps prevent flooding and water damage to structures by ensuring proper drainage away from foundations and landscaped areas. Understanding the role of leaders in plumbing is crucial for effective stormwater management, especially in regions prone to heavy rainfall.

Other options provided pertain to different functions within plumbing systems, but they do not align with the definition of a leader. For instance, while an interior drainage pipe is important for managing wastewater within a building, it does not specifically deal with stormwater as a leader does. Similarly, pipes used for sewage transport or venting gases have distinct purposes related to waste management and air pressure regulation within plumbing systems, rather than stormwater management.