The general and more technical term for handling the wastewater from the tank is the soil absorption system. The most common type is the drain field. Once sewage undergoes primary treatment in the septic tank, the clarified effluent flows to the drain field, where it is discharged into the soil for final treatment and disposal.
A typical drain field consists of several relatively narrow and shallow gravel-filled trenches with a perforated pipe near the top of the gravel to distribute the wastewater throughout the trench. We always install Chamber System drain fields. These are installed in a shallow drain field and replace the typical gravel and pipe system. It consists of interlocked high-density polyethylene chambers that rest on the bottom of a shallow trench. The chambers have louvered sidewalls and are open at the bottom, allowing the effluent to pass directly into the soil.