How can an inspector confirm that effluent is delivered to the distribution box?

To confirm that effluent is delivered to the distribution box, uncovering the D-Box and running minimal water into the system is the most effective method. This approach allows the inspector to directly observe if the effluent flows into the distribution box when water is introduced. It provides immediate and visual confirmation of the system's functionality and indicates whether the system is operating correctly.

Running water into the system can simulate regular use, showing whether the D-Box receives effluent as it should. If water flows into the distribution box without issues, it demonstrates that the paths for effluent are clear and functioning properly, establishing confidence in the distribution system's integrity.

Other methods like inspecting the tank's structural integrity or checking for blockages might offer some insights into the system's overall condition, but they do not specifically confirm the flow of effluent to the distribution box itself. Measuring the water level in the tank could indicate if the tank is adequately filled, but it wouldn't provide information about the actual delivery of effluent to the D-Box. Hence, the hands-on approach of uncovering the D-Box and testing with water is the most direct and effective way to ensure that effluent is reaching the distribution box.