It has been three or four years since I’ve had a specific question about septic system venting and the impact it has on reduction of gas concentrations at septic tank outlets. Every service provider has seen corrosion in concrete tanks. Most commonly, excessive deterioration is taking place around the outlet baffle in a septic tank. The question is whether anything can be done to stop it. The reader in this case was seeing problems in an aerobic system in the pump tank.
When I started in the industry, it was recognized that the sewer line, septic tank and, by extension, the drainfield vented back to the indoor
