How To Find Septic Tank Lid With Metal Detector. Because the tanks are often made of concrete, fiberglass or plastic, a traditional metal detector can have a hard time finding the septic tank. Using a metal detector can help you find the lid.
I have discovered the first lid (to the access point) by my front door. Once you find the tank, it is a matter of digging to find the lid. Make accurate measurements from the center, edges, or other chosen point of the tank tank cover to a reference point or better, a pair of reference points so that in the future if the tank accesses are.
After consulting the site plan, you should have an idea of where the lid is so search around that spot.
Use a metal detector to find the septic tank. A metal detector help locate a buried concrete tank by finding the reinforcement bars. Eventually, all septic tanks fill with solids and require regular pumping out to stay in good working order. I have discovered the first lid (to the access point) by my front door.