Abstract: A flow distribution box for a wastewater treatment system includes an inlet into a back wall and outlets in the opposed outer side walls and front wall, the distribution box including a plurality of flow dividers therein to compartmentalize effluent within the flow distribution box. A flow director is disposed in the inlet into the flow distribution box for directing the flow into selected compartments within the distribution box. Each of the outlets in the box is in flow communication with a conduit leading into a selected area of a drain field.

Abstract: An improved distribution joint for a septic tank system includes a fixed flow divider to apportion the effluent between two or more absorption fields. An adjustable flow control valve varies the relative amounts distributed between the two fields without disturbing the effluent and distribution lines or the junction itself.

Abstract: This invention is an improved distribution joint used in conjunction with septic tank absorption field systems. The invention more particularly divides and accurately controls the distribution of septic tank effluent into separate portions of the absorption fields while eliminating the buildup of flow disrupting sediment on the divider by providing a unique flow pattern thereover.