What is a common error when digging the last lateral line in a septic system?

In the context of installing a septic system, one common error is failing to completely lay out the system prior to excavation. Taking the time to carefully plan and layout the system ensures that every component is placed correctly and according to regulations. Inadequate planning may lead to crucial mistakes, such as improper distances between lines or failure to meet specific local requirements.

By not laying out the system completely before beginning excavation, the installer can easily misplace the last lateral line in relation to other components of the system. This misalignment can lead to inefficiencies, malfunctions, or even violations of local codes. Proper layout acts as a guide during excavation, ensuring that all elements are positioned where they should be to maximize the system's effectiveness.