Which of the following actions is NOT advisable for maintaining a septic system?

Using waste disposal systems for non-biodegradable items is not advisable for maintaining a septic system because these items do not break down and can lead to clogs and backups. Septic systems rely on the natural processes of anaerobic bacteria to decompose organic matter. Non-biodegradable items, such as plastics, metals, and certain chemicals, can accumulate in the tank and the leach field, obstructing proper flow and function.

In contrast, regularly inspecting the system, pumping the tank as needed, and keeping debris away from the system are all recommended practices. Regular inspections can help identify potential issues before they become significant problems. Pumping the tank is essential to remove solids that accumulate over time, ensuring that the system functions effectively. Keeping debris away from the system prevents blockages and protects the septic system from damage. Thus, promoting the proper functioning and longevity of the septic system requires avoiding the disposal of non-biodegradable items.