1664 Septic Tank Pump Out - Plumbing - Septic Systems -

Image Text: Cross section > if has been suggested that the septic tanks be pumped out every three years (or when the scum mat is thicker than 3 inches and/or the sludge depth exceeds 24 inches) > grade level > waste (from house) > access cover (manhole) > inlet dip pipe > scum mat > less than 3 inches > sludge > less than 24 inches > septic tank > access cover (manhole) > outlet dip pipe > effluent > effluent (to tile bed)