Which design feature must be present to ensure the outlet baffle functions correctly?

The necessity of an air break in ensuring the correct functionality of the outlet baffle is primarily related to proper flow dynamics and preventing backflow. An air break allows for a gap that maintains airflow and pressure differentials, which are essential in wastewater management systems. This feature helps in regulating the level of liquid in the tank and ensuring that effluent moves to the next stage of treatment without obstruction.

By having an air break in place, it allows the system to operate efficiently by preventing siphoning action that could drag solids from the tank, thus ensuring that only effluent is directed beyond the outlet baffle. This is crucial as it contributes to the longevity and effectiveness of the septic system by maintaining separation of solids and facilitating proper treatment processes.