Design of the inlet hole for the distribution box
Inlet and Outlet Hole Elevations - The invert of the inlet hole or knockout shall be a minimum of two inches to a maximum of three inches above the invert of the outlet hole. Distribution and dosing devices include distribution boxes, flow splitters, siphons, pumps and other flow diversion devices. The hydraulic involved in distribution box is presented in Doc n° MF4-S40 "Crest flow in distribution box" All the details can be found in the drawing Drawing n° MF4-D43: Example: Find details about the DB in the sketch map of the network: Number and diameters of outlets are written inside the DB. A distribution box, commonly referred to as a D-box, is a concrete, plastic, or fiberglass structure that serves as a junction point for wastewater from the septic tank before it flows into the drain field. Equal distribution is very important in order to take advantage of all of the available leaching area. Drop boxes are used to deliver effluent between trenches on slop-ing sites through sequential distribution.
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