A concrete septic tank, the most common tank type, can last as long as 40 years. To maximize a septic tank’s lifespan, is it recommended to pump a septic tank every 2 to 3 years. As part of the service call, the septic service company should inspect the complete system for potential issues that could require repairs. Identifying and repairing issues quickly can extend the septic tank and system life. It is also recommended to avoid flushing items down the toilet that could harm the septic system and lead to failure, including hazardous waste, disposable diapers, coffee grounds, paper towels, paint thinner, and other household and personal care items. Learn about septic system lifespan, identifying possible septic tank and septic field failures, and how to extend the life of a septic system.