What is the purpose of baffles in a septic tank?

Baffles play a crucial role in the operation of a septic tank by directing the flow of wastewater within the tank. They are designed to prevent scum (the layer of floating solids and fats that can form on the surface of wastewater) from escaping the tank and entering the drain field. By guiding wastewater in a way that encourages proper separation of solids, liquids, and scum, baffles help to ensure that only the liquid effluent flows out of the tank to the leach field for further treatment. This process is vital for maintaining the efficiency and longevity of the septic system by reducing the risk of clogs and ensuring that the wastewater is adequately treated before it reaches the soil.

The purpose of baffles significantly enhances the effectiveness of the septic system, ensuring that solids are properly retained within the tank for breakdown and that the effluent is cleaner when it exits the tank.