Where should a gas deflection baffle be placed in a single compartment tank?

In a single compartment sewage tank, the placement of the gas deflection baffle is critical for ensuring proper functionality and preventing issues related to the escape of gases. The correct position for the gas deflection baffle is below the outlet of the baffle.

This positioning is important because it helps to direct any gases that may form within the tank away from the outlet, minimizing the risk of gas venting into the drain-field area. By having the baffle located below the outlet, it efficiently traps and deflects the gases released during the decomposition of organic waste, facilitating their rise to the surface of the tank where they can be vented appropriately. This design not only enhances the safety of the system by preventing gas migration but also ensures that the effluent discharged through the outlet is clear of impurities that might be carried by bubbling gases.

Having the baffle placed either above the outlet, at the inlet, or at the surface level would not effectively manage the gases, potentially leading to improper drainage, odors, or even harmful conditions in the vicinity of the septic system. Therefore, positioning the gas deflection baffle below the outlet is a fundamental design choice that supports the effective operation of the septic tank system.