The first signs of distribution box failure are slow indoor drains, gurgling plumbing, wet or soggy patches concentrated over one section of the drainfield, and sewage odors near or inside the house. This component receives partially treated liquid waste, known as effluent, from the septic tank's outlet pipe. When the D-box becomes clogged or tilted, it may cause uneven distribution of wastewater, leading to. The operation of a distribution box is relatively straightforward. Understanding the proper distance between the septic tank and the distribution box is vital for the system's effectiveness and longevity. We'll walk through locating the tank, probing trenches, digging carefully to avoid damage, and identifying the inlet and outlet.