Bacteria in introduced in to the tank to digest
the material introduced into the tank. The end products are water, gases, and the remaining undigested material (called sludge) that sinks to the bottom
of the tank and the scum that floats to the top of the tank. The septic tank contains baffles that prevent any scum that floats to the surface and
sludge that settles to the bottom from leaving the tank and therefore requires periodic maintenance of pumping the tank to remove it.
The better the Bacteria performs the less oftern the tank will require pumping. The gasses generated are vented to the surface.
, controls the flow of a relatively clear liquid where it is then
metered out to several perforated pipes.
perforated pipes that deliver the liquid to a large
soil surface area, called a leach field, or absorption field, for absorption. The soil also acts as a filter to remove any small amounts of solids
that may be carried along with the liquid.