The effluent filter support case shall serve as a functioning sanitary tee with the bottom inlet extending down between what percent of the liquid depth?

Study for the North Carolina Septic Inspector Exam. Use detailed flashcards and multiple choice questions with hints and explanations. Get exam-ready today!

Positioning the bottom inlet of the effluent filter case so it extends down into the liquid by about one-quarter to two-fifths of the liquid depth keeps the flow entering below the surface scum but above the settled sludge. This places the discharge in clearer liquid, which helps the system function like a sanitary tee and promotes consistent gravity flow into the outlet without pulling in floating scum or heavier solids.

If the inlet is too close to the top, scum can enter the outlet and interfere with the filter or cause short-circuiting. If it’s too deep, solids near the bottom can be drawn into the outlet, increasing the risk of clogging and reducing effluent quality. The 25–40 percent range strikes a balance, ensuring proper separation of layers and reliable operation.