Which of the following practices can harm a septic system?

Flushing non-biodegradable items significantly harms a septic system because these materials do not break down naturally within the tank, leading to clogs that can impede the function of the system. Non-biodegradable items can include things like plastic, sanitary products, and certain types of wipes. When these items accumulate, they prevent proper flow and can create blockages in both the tank and the drain field, causing backups and expensive repairs.

In contrast, regular pumping of the tank is a healthy maintenance practice that allows for the removal of sludge and scum buildup, helping the system function efficiently. Using septic-safe products ensures that the natural bacteria needed for breaking down waste are not disrupted, which helps maintain the biological processes crucial for septic operation. Distributing water usage evenly throughout the week helps prevent overload, reducing the risk of system failure by allowing enough time for wastewater to be treated effectively and preventing saturation of the drain field.