Summary: killing two birds with one stone and assuring that you begin with an empty tank and a system that has been inspected. Often, you can negotiate with the seller to have them pay for the pumping. Description of Private Sewage (Septic) System A private sewage (onsite waste disposal) system must be installed whenever a house is not connected to a public or municipal sewage system.
Image Dimensions: 300 x 400
Image originally found here.