How long will an average septic system last? The life of a septic system can vary considerably. Local environmental conditions and general maintenance can affect the longevity of a soil absorption system. In theory, a septic system that is designed and installed properly can function indefinitely. However, because many private sewage-disposal systems are not maintained properly, a typical system may last only 20 years. It is common for responsible contractors to assess and reserve a second area of suitable soil in the event that a repair area is needed.

Soil absorption systems work best when the amount of solids, greases, and fats that will settle are kept to a minimum. It is impossible to block all these items from entering a septic system, but much can be done to reduce the amount of unwanted material. For example, let s say that you have had bacon for breakfast. You placed a paper towel on a plate and drained the bacon. This usually results in a grease-soaked paper towel. Grease and fat are present. Neither of these is good for a septic system. Many people will discard the paper towel and wash the plate. The film layer of fat and grease on the plate goes down the drain and into the septic system. This is bad for the drainage piping in the home and for the septic system. Take the plate to the trashcan and wipe it clean with a disposable towel. Once the plate is free of most fat and grease, you...