When multiple connectors enter a common vent, where should the smaller connector be positioned?

The correct positioning of the smaller connector at the highest level when multiple connectors enter a common vent is essential for ensuring proper venting and airflow dynamics. In a venting system, the vent must allow gases to escape efficiently while preventing the backflow of air.

By placing the smaller connector at the highest level, it ensures that any gases from the smaller system have a clear upward path to escape through the vent, minimizing the risk of blockage or restriction that can occur if it is placed at a lower level. This configuration also helps to maintain an effective venting system, as it permits gases from the larger systems to rise naturally without interference.

Additionally, an arrangement where the smaller connector is higher protects against condensation and back pressure. If the smaller connector were positioned lower, it could lead to issues where the gases do not vent effectively, potentially causing hazardous conditions. Therefore, placing the smaller connector at the highest level promotes optimum performance and safety in the venting system.