Georgia Septic Installer Practice Test

Outlet inverts of concrete drop boxes shall be located a minimum of what distance from the bottom of the box?

1. 2 inches

2. 3 inches

3. 4 inches

4. 5 inches

The correct answer is: 3 inches

The correct answer is based on established standards for septic system design and installation that help to ensure proper functioning and longevity of the system. Outlet inverts of concrete drop boxes are crucial as they dictate the flow dynamics within the septic system. Placing the outlet invert a minimum of 3 inches from the bottom of the box helps to prevent the accumulation of solids and sludge at the outlet. This distance ensures that effluent can exit the box effectively without being obstructed by settled solids, which is essential for maintaining the overall health of the septic system. A buffer of this size also enhances the system's ability to handle heavy rainfall or flooding conditions, as it allows for better water movement and prevents backflow or overflow situations that could jeopardize the system's operation.