Cleaning and servicing your septic tank on a regular basis is necessary in order for it to last and do its job for a long time. It does not matter what type of septic system you have, all types need to be serviced regularly.
Many homeowners believe the common misconception that if their septic tank is not having any noticeable problems, they do not need to pump it. This is false and can lead to expensive repairs in the future if continued.
Septic systems build up solid waste at the bottom of the tank, while liquids and other lightweight materials float at the top. When the solid layer builds up enough, the sewage has less time to settle before leaving the tank and more solid wastes can escape into the soil absorption system. If the soil absorption system becomes clogged or backed up from this, sewage and wastewater will bubble up to the surface. Clogging or rupturing your soil absorption system and drainfield can cost thousands of dollars to fix.
An average sized septic tank typically needs to be pumped every three or four years. However, yours may need to be pumped more or less often depending on the size of your tank, and the number of occupants in your home. If you have a smaller tank with many occupants in your home, it will need to be pumped closer to every one or two years. If your tank is large and you only have a few occupants in your home, it will be okay to be pumped every five or six years.