Septic Tank•A septic tank is an underwater sedimentation tank used for wastewater treatment through the process of biological decomposition and drainage.•A septic system has a simple design. It is an underground watertight container (mostly rectangular or round) made of fiberglass, plastic or concrete.
•The tank is connected with two pipes (for inlet and outlet). The inlet pipe collects the water waste in the septic tank, long enough that the solid and liquid waste is separated from each other. The outlet pipe also called the drain field, moves out the preprocessed wastewater from the septic tank and spreads it evenly in the soil and watercourses.
How Septic Tank Works •All water runs out of your house from one main drainage pipe into a septic tank.•The septic tank is a buried, water-tight container usually made of concrete, fiberglass, or polyethylene. Its job is to hold the wastewater long enough to allow solids to settle down to the bottom forming sludge, while the oil and grease floats to the top as scum.Compartments and a T-shaped outlet prevent the sludge and scum from leaving the tank and traveling into the drainfield area.