Septic System Types Aerobic Conventional Low Pressure Commercial	Q: What is a septic tank? A: A septic tank is a watertight container, generally made of concrete, that is buried on your property and that receives wastewater from your home. Q: How often should my septic system be cleaned? A: Septic tanks should be pumped and inspected every 2 years, but cleaning depends on your tank size and the frequency of use. Q: How do I know what kind of system I need for my property? A: A septic designer can advise you about what system would work well with your specific property and needs.   Q: Why do I need to have my septic system inspected before I sell my property? A: New Hampshire real estate and loan company rules state that a property’s septic system must be inspected before the buyer can be approved for a loan. Q: I am not experiencing any problems with my septic system; do I need to have it pumped anyway? A: Absolutely! Regular septic system maintenance is the only way to ensure that your system will remain problem free.