What type of vent connects at the junction of two fixture drains to serve both fixtures?

The common vent is specifically designed to connect at the junction of two fixture drains, serving both fixtures by allowing gases and odors to escape while maintaining the necessary pressure balance in the drainage system. This type of vent facilitates proper drainage by preventing siphoning or backpressure that can occur when fixtures are used in rapid succession.

In a plumbing installation that includes multiple fixtures positioned closely together, the common vent simplifies the venting process while ensuring compliance with plumbing codes. It helps maintain the proper flow of wastewater and keeps trap seals intact, which is crucial for preventing sewer gases from entering the living space.

Understanding that a common vent is used to serve two fixtures simultaneously highlights its importance in efficient plumbing design and the adherence to the standards set forth by the Kentucky Plumbing Code.