A large number of people think that whenever something leaves the drainage system inside their own house, they don't need to be afraid of anything going wrong afterward. However, what we often forget is that septic tanks don't always work perfectly without maintenance, especially if we take into account the several inappropriate things we send through drainage lines. While it's true that you can have a very good septic tank that won't give you much trouble if you use the drainage lines properly, you still need to take care of maintenance before it's too late.
Let's first see how septic tanks function properly for so long without maintenance. Initially, when something travels through the lines from our homes, it goes to the septic tank. Visualize of it as a gigantic tank that is usually made of concrete though very old ones are probably made of steel. The drainage lines enter the tank through an inlet tee near the top, while there is another outlet tee at the other end from where liquids leaves the tank and goes to the drain field into the soil.
Upon water entering via the inlet tee, the solid materials often sink to the bottom of the tank make a sludge. Some solids that don't sink inside the water gather at the surface along with grease and oily liquids forming scum. Since the outlet tee is at a certain height, solids from the sludge usually don't pass on to the drain field. Likewise, the tees keep sludge and dirt away from the out and inlet.
Bacteria within the septic tank help to liquify the solids, ensuring that they don't build up too much. This is how septic tanks keep working in good shape unless something wrong happens, which usually does eventually. The issues most often happen when debris reaches the out or inlet. So the only way to keep the system running smoothly is by pumping the waste out of the tank before the sludge or scum become overgrown in volume.
Nevertheless, you still need to be careful in your routine life to increase the performance of septic tanks. Firstly, the drain field should not be damp with rainwater; if it is already overloaded with water from other sources, it would not be able to efficiently absorb the water coming from the septic tank. Likewise, make sure that your internal draining lines are not putting an unnecessary amount of water into the septic tank. A common reason for this can be leaking faucets or overrunning showers. So fix these problems whenever you come across them.
Secondly, never plant trees near the septic tanks as they may grow inside the ground and their roots may eventually penetrate into the tanks causing permanent damage. And don't throw all sorts of garbage into your drainage system. Diapers, condoms, napkins aren't usually broken down into liquids by bacteria and would quickly pile up the level of sludge inside the septic tank. Also take care not to use chemical cleaners in large quantities; these cleaners typically eliminate bacteria inside the tanks and hinder the processing of liquefying solids. And most importantly, never drain grease or other oily liquids; these would gather inside tanks as scum and may even harm the soil and drain field if they escape through the outlet.
Take all these precautionary steps and you will rarely face problems with the septic system.