What is the term used for a vent that connects one or more individual vents with a vent stack?

The term for a vent that connects one or more individual vents with a vent stack is known as a branch vent. A branch vent functions to extend from a horizontal drain or vent and connects to a vertical vent stack, ensuring that gases can exit the plumbing system effectively and that proper air circulation is maintained. This is crucial for preventing pressure imbalances that could disrupt drainage and lead to issues such as trap siphoning or foul odors entering living spaces.

Understanding the specific roles of various vents is essential in plumbing design, as it helps ensure that systems function safely and efficiently. A stack vent, for instance, typically extends above the highest fixture and is used to vent the system directly to the atmosphere, while a soil vent primarily relates to waste and soil drainage. A drain vent does not specifically connect individual vents to a vent stack, making branch vent the most precise term in this context.