Collection lines are typically capped on what part?

Capping a collection line at the top is a standard practice in wastewater management systems. This approach serves multiple purposes. First, it prevents debris and other materials from entering the system, which could lead to clogs or other complications in the wastewater treatment process. By capping the top, you also allow for easier access to the line for maintenance and inspections, as technicians can quickly identify potential issues without having to excavate the entire line.

Additionally, capping the top of the collection line aids in maintaining the proper flow of wastewater, as it allows for better regulation of the system's hydraulic design. It ensures that any gases that may accumulate within the system can vent properly, thereby reducing the risk of buildup that could lead to pressure issues.

In contrast, capping the bottom or middle of the collection line could obstruct flow or create points where blockages are more likely to occur, leading to inefficiencies or potential backflows in the system. Therefore, capping the top aligns with best practices for ensuring a functional and efficient private sewage system in Illinois.