What is the primary purpose of a septic tank's baffle?

The primary purpose of a septic tank's baffle is to collect solids and prevent them from entering the drain field. The baffles serve as barriers that direct the flow of sewage within the tank, ensuring that heavier solids settle to the bottom while allowing liquid effluent to flow out to the drain field. This is crucial because if the solids were to enter the drain field, they could clog and disrupt the soil absorption area, leading to system failure and potentially contaminating groundwater. By effectively managing the solid waste within the septic tank, baffles help maintain the system's efficiency and prolong its lifespan, ensuring proper treatment of wastewater. This function is vital for the overall operation of a septic system.