Georgia Septic Installer Practice Test

For molded plastic and fiberglass distribution boxes, the invert of the outlets shall all be the same and shall be how many inches below the invert inlet?

1. 1 inch

2. 1 ½ inches

3. 2 inches

4. 2 ½ inches

The correct answer is: 1 ½ inches

The correct answer is 1 ½ inches below the invert inlet for molded plastic and fiberglass distribution boxes. This specification is critical for ensuring that wastewater flows correctly through the system without pooling or causing backflow. The uniform outlet level helps maintain the hydraulic gradient necessary for effective drainage from the distribution box to the leach field or drain field. By establishing this specific measurement, the design promotes proper distribution of effluent, which is essential for evenly treating wastewater and preventing localized saturation or clogging. A consistent outlet level helps in achieving optimal performance of the septic system, ensuring that the treated effluent is adequately dispersed throughout the field and not overwhelmed at any single point. Maintaining the correct height differential of 1 ½ inches helps installers to align the distribution box with industry standards and guidelines that are understood to promote the longevity and efficiency of septic systems.