FAQs How Often Should Septic Tanks Be Pumped? Septic tanks should be pumped every 3 to 5 years. This will help maintain a healthy septic system. Price Of New Septic System? The cost of a new system will depend on the area and the soil. A site inspection with drainage testing is needed before responsibly and realistically pricing a new septic system installation. What Will Help Sustain The Life OF My Current Septic System? Please contact our office for recommended bacteria and other suggestions for maintaining your septic system.