Risers can be added on top of the tank. These help you locate and access the tank without digging. Septic system pumpers can add these. [3] X Research source
It is useful to run some water from your house, such as from the toilet or washing machine, to see if the water makes it to the tank and then drains properly.
Not all tanks come installed with filters.
The smaller the tank, or the more people the tank services, the more frequently it will need to be treated. A 750 gallon tank, standard in a two-bedroom home, will last two residents about four years without pumping. For four residents, it will last less then two years without pumping. [13] X Research source Annual treatment will, at the cost of a couple hundred dollars, keep the tank clean and allow any problems to be detected before they turn into serious septic failures.