A SEPTIC TANK NEEDS TO BE TREATED AT LEAST ONCE EVERY COUPLE OF YEARS!
You should pump your cesspool every couple of years. Put at least 10 gallons of chemical (acid) in a Precast Cesspool (*Note – acid should never go into a septic tank). Lastly, Aerate your cesspool regularly to allow it to properly drain.
Usually, when a cesspool is full the water will drain but very slowly. If the water does not drain at all then you likely have a clogged line.
If you have to pump your tank more than once a year it is time to upgrade to a new septic tank.
If you have a block cesspool from the 1930s, 40s, 50s or early 60s you should fill it in and replace it with a Precast Cesspool. A dip in your lawn is an indication that
your Block Cesspool is caving in.
Note – most houses have two cesspools. Always pump out and treat both cesspools before you replace your cesspool