Georgia Septic Installer Practice Test

What is the requirement for absorption line elevation compared to the septic tank outlet?

1. 1 inch lower

2. 2 inches lower

3. 3 inches lower

4. 4 inches lower

The correct answer is: 2 inches lower

The requirement for the absorption line to be positioned at a certain elevation relative to the septic tank outlet is critical for ensuring proper drainage and wastewater flow. Specifically, the absorption line must be set at least 2 inches lower than the outlet of the septic tank. This elevation difference is essential for gravity flow, which relies on the principle that wastewater must flow downhill to drain properly into the absorption field. If the absorption line were flush with or higher than the septic tank outlet, it could lead to improper drainage, resulting in backups and potential failures of the septic system. Additionally, maintaining this minimum elevation helps facilitate the settling of solids and allows for effective distribution of effluent throughout the absorption field, promoting optimal treatment and absorption in the soil. In summary, the 2-inch requirement is a specific guideline set forth in septic system installation standards to ensure the efficient operation of the system by promoting gravity flow and proper effluent distribution.