Your septic tank is made of concrete or steel and is buried in the yard behind your home. How big is this tank? It depends on the size of your home! Click over to this infographic about septic tank maintenance in Bergen County to find more details.
This is a picture friendly guide on what how septic systems work "How often you need your tank pumped depends on the size of your tank and the number of people in your household, usually every 1-5 years."