How To Find Your Septic Tank Lid. Simply use a measuring tape to measure out the dimensions to find the septic tank lid. Most septic tanks are rectangular and measure about 5 feet by 8 feet.
The process of septic tank lid replacement may be easy for some people but isn’t so for others. During your search, keep an sharp eye out for a circular top that’s about two feet wide. In most cases, septic tank components including the lid, are buried between 4 inches and 4 feet underground.
Depending on the setup, it can be either two or three lids.
Depending on the setup, it can be either two or three lids. During your search, keep an sharp eye out for a circular top that’s about two feet wide. Probe around the tank to locate the edges and mark the perimeter. In your basement, locate the area where the septic lines leave your home.