A septic tank cap, also called a lid or access hatch, is normally located on the top of the tank near the center. Most caps are square in shape and are approximately 16 inches across. This cap acts as an access point to the interior of the tank for cleaning and other maintenance.
Do I need to uncover both septic tank lids?
If you have a 2-compartment tank (houses built from 1975 to present have 2-compartment septic tanks), you will need to uncover both tank covers. Both compartments are required to be inspected and pumped. If the second compartment goes without pumping, it will eventually fill with solids and create problems.Jul 21, 2017