Question: Can a septic system with a cesspool pass a septic inspection?

Answer: Cesspools have not been installed legally since 1970. This means they are at least 47 years old. The average life of a septic system is 35 years. However, the answer is yes. Many cesspools pass septic inspections and some even pass hydraulic load tests. Sometimes you need to do an extended hydraulic load test if they have been sitting empty because the house has been vacant for a long time.