What is the purpose of a d-box in a septic system?

The purpose of a distribution box, commonly referred to as a d-box, in a septic system is to ensure that effluent is distributed evenly to the leach field or drain field. This distribution is vital for the proper functioning of the septic system because it helps prevent overloading any particular section of the leach field, which can lead to system failure and environmental contamination. An evenly spread effluent allows for optimal absorption by the soil and reduces the risk of ponding or surfacing of wastewater.

This function is crucial because an imbalanced distribution can result in certain areas of the leach field being over-saturated, while others may remain dry. By directing the flow appropriately, the d-box plays a key role in maintaining the efficiency and longevity of the septic system.