Human: How can I find out what kind of septic tank I have? Assistant: 
You can check the label on your septic tank to see if it is a gravity-fed system, a pump-and-filter system, or a combination system. Gravity-fed systems are typically found in rural areas and use natural forces such as water tables and soil absorption to remove waste from the tank. Pump-and-filter systems rely on pumps to move waste through a filter before it enters the drain field. Combination systems combine both methods.