Regular maintenance is the best method to prevent a septic system failure. Septic maintenance includes inspecting the entire system every 1 to 3 years and pumping the tank every 3 to 5 years. The frequency for pumping the septic tank depends on the tank size, number of people in the household, the water habits and use, if a garbage disposal is used, and the amount of solids accumulated in the tank. A rule of thumb is to pump the tank when the solids are two-thirds of the volume in the tank. Routine maintenance is the responsibility of the home or property owner. If you rent a home, you have responsibility for the proper use and operation of the system.
In general, you can avoid a septic system failure by:
Inspecting your system every 1 to 3 years
Pumping the tank every 3 to 5 years or as needed
Avoiding excess water use (e.g. spreading out laundry use over the week)
Flushing only human waste and toilet paper down the toilet.