When is a gas deflection baffle required in a septic tank setup?

A gas deflection baffle is specifically required below the outlet baffle in a septic tank setup to prevent the escape of harmful gases, such as methane, from the tank. This baffle is designed to redirect gases back into the septic tank, ensuring they do not escape into the environment or the surrounding area. By placing the gas deflection baffle in this position, it helps maintain a safe operating environment for the septic system and reduces the risk of odor or potential health hazards associated with gas release.

This placement is critical because the outlet baffle is where effluent exits the tank and where gases could potentially rise and escape. The gas deflection baffle acts as a barrier, allowing properly treated effluent to exit while containing and managing gaseous byproducts of the anaerobic digestion process occurring within the tank. This effectively protects the system and surrounding environment from gas-related issues.