How should the baffle be positioned relative to the tank walls?

The baffle in a septic tank is a critical component that plays a significant role in the proper functioning of the system. It is designed to direct the flow of wastewater and prevent the mixing of incoming sewage with settled solids and scum. Positioning the baffle tightly sealed against the tank walls ensures that it effectively directs the flow without allowing wastewater to bypass the baffle or create turbulence that could disturb settled materials.

A tightly sealed baffle minimizes the chances of leaks or infiltrations between the waste and treated water compartments, ensuring that the separation of scum and sludge is maintained. This positioning is essential for proper wastewater treatment as it helps clarify the effluent before it exits the tank to the drain field, reducing the risk of pollution and ensuring compliance with regulations.

In contrast, loose fitting, floating, or removable baffles could lead to inefficiencies in the system, such as mixing of different layers or bypassing treatment processes. These alternatives could compromise the function of the tank and hinder the overall effectiveness of the sewage treatment system.