Distribution boxes shall be constructed from what type of material?

The correct choice for the construction material of distribution boxes is watertight, non-corrosive material. This is essential because distribution boxes play a critical role in the proper functioning of a sewage system, as they help distribute effluent evenly to multiple drain fields from a single septic tank.

Using watertight materials ensures that the effluent remains contained within the distribution box without leaking into the surrounding soil, which could lead to contamination and groundwater pollution. Non-corrosive materials are important as they resist deterioration over time, especially when exposed to the chemicals and microorganisms present in sewage. Materials such as certain types of plastics or specially treated composites are often utilized for their durability and resistance to corrosion.

Other materials, such as steel, may not be suitable due to their tendency to rust and degrade in the presence of moisture and sewage, leading to structural failure. Concrete, while robust, can be prone to cracking and may not always provide the watertight seal needed. Thus, selecting a watertight, non-corrosive material is crucial for ensuring the longevity and functionality of distribution boxes in sewage systems.