Georgia Septic Installer Practice Test

What is the required distance the invert of the pipe ports leading to the disposal trench must be below the invert of the inlet for molded plastic and fiberglass drop boxes?

1. 3 inches

2. 4 inches

3. 6 inches

4. 8 inches

The correct answer is: 6 inches

The required distance that the invert of the pipe ports leading to the disposal trench must be below the invert of the inlet for molded plastic and fiberglass drop boxes is indeed 6 inches. This regulation ensures proper flow and prevents backflow or pooling, which could compromise the effectiveness of the septic system. Adequate elevation drop is crucial for gravity-driven systems to function optimally and to facilitate clear drainage towards the disposal area, thereby reducing risks of system failure or environmental contamination. While other distances might seem plausible, they do not account for the necessary hydraulic gradient that needs to be maintained within the system. Proper adherence to the 6-inch requirement is vital for ensuring a reliable and efficient installation, which ultimately ensures the longevity and regulatory compliance of the septic system.