A vent that serves only one fixture (unless connected to two back-to-back fixtures) is called an ____.

A vent that serves only one fixture (unless connected to two back-to-back fixtures) is called an ____.

• A. Individual vent
• B. Common vent
• C. Branch vent
• D. Special vent

Answer: (A)

Venting in plumbing is about whether a vent serves a single fixture or more than one. A vent that serves only one fixture is called an individual vent. This type connects directly from that fixture’s trap area to the vent stack, giving air access so the drain can flow freely and preventing the trap from being siphoned. If the vent serves more than one fixture, it’s not an individual vent anymore. Two fixtures sharing a vent make it a common vent, while a branch vent is used to vent a group of fixtures from a drainage branch. A special vent isn’t a standard term used in typical codes. So, because this vent serves just one fixture (unless two back-to-back fixtures share it), the correct term is an individual vent.

Venting in plumbing is about whether a vent serves a single fixture or more than one. A vent that serves only one fixture is called an individual vent. This type connects directly from that fixture’s trap area to the vent stack, giving air access so the drain can flow freely and preventing the trap from being siphoned.

If the vent serves more than one fixture, it’s not an individual vent anymore. Two fixtures sharing a vent make it a common vent, while a branch vent is used to vent a group of fixtures from a drainage branch. A special vent isn’t a standard term used in typical codes.

So, because this vent serves just one fixture (unless two back-to-back fixtures share it), the correct term is an individual vent.