Its been on borrowed time...it was installed in 1979 for the previous owner of the property....
It was for a manufactured home at the time, I bought the property in 88 , lived in the
MH * as I built my house, I completed in 91.
I just hooked on to it to save Building costs , it is fiberglass tank... and the plastic drain field is now shot ( heck I got 30 years out of it

.....
I could just replace the DF , but the tank size is not to current code for the # bedrooms & baths dishwasher and laundry etc.
County wouldn't issue a permit.
Actually to replace the tank is only about $1100 added to the replacing the field anyway.
Soooo.... I figure , if we decide to sell and move to a smaller place , a new Septic system is a perk point
* sold the manufactured home and had it hauled off when the house got its CO