When two or more vent connectors enter a common gas vent, which connector should enter at the highest level?

When two or more vent connectors enter a common gas vent, the connector that should enter at the highest level is the smaller connector. This practice is essential for ensuring the safe and efficient functioning of the venting system.

The rationale behind this is primarily based on the principles of gas flow and the need to maintain proper venting performance. Smaller connectors typically have a reduced capacity for gas flow compared to larger ones. Allowing the smaller connector to enter at a higher level helps prevent the potential backflow of gases from the larger connector, which may carry a heavier gas that could interfere with the proper venting of the gases from the smaller connector.

Positioning the smaller connector higher also aids in minimizing the risk of condensation buildup within the vent system. This is important because condensation can lead to corrosion or blockage, hampering the efficiency of the venting process. By ensuring that the smaller connector enters at the highest level, you promote better flow dynamics within the common gas vent, thereby enhancing the overall safety and effectiveness of the system.