What is a septic system and how does it work?
A septic system consists of three main parts a septic tank, a distribution system, and a drain field. Sometimes when people refer to a drain field, we hear the words leach field, disposal field or a soil absorption system. The septic tank: The septic tank provides the first step in treatment. We all know household water and human wastes flow down the drains and toilets, but what happens after that? The water and wastes flow into a concrete, fiberglass, or plastic septic tank. The underground tank has an outlet valve and an above ground access port used when the tank is cleaned. When the water and wastes flow into the tank, they rest for a day or so. During this time in the tank, the wastes begin to break down and settle into three layers. Some solids are lighter than water (grease, oils, and toilet paper) and they float to the top of the tank forming a layer of scum. The heavier solids sink to the bottom of the tank forming a layer of sludge. Partially clarified water forms the middle
