Why do I need a larger septic tank if I’m going to have a garbage disposal?
A – The purpose of the tank is to remove the solids from the wastewater so they do not reach the drain field and plug it. Therefore, a larger tank is required because more solids are being introduced into the system. A garbage disposal also chops up the solids resulting in finer solids that tend to float in the solution longer and thus have a greater potential of reaching the drain field.