What is the role of washed gravel or crushed stones in an Absorption Field?

The role of washed gravel or crushed stones in an Absorption Field primarily revolves around their function in the overall effectiveness of the wastewater treatment system. They are essential in covering the distribution pipe, providing a stable and conducive environment for effluent dispersion.

When wastewater flows through the distribution pipe in the absorption field, the surrounding gravel or crushed stone acts as both a protective layer and a medium that facilitates the movement of effluent throughout the field. This layer ensures that the effluent is evenly distributed, allowing it to seep into the soil more effectively. By covering the distribution pipe, this material also prevents sediment and debris from entering the pipe, which could lead to clogs and inefficiencies in the system.

Choosing washed gravel or crushed stones ensures that there is adequate space for air and biological processes to occur, which are critical for effective wastewater treatment. The design of the absorption field relies on the optimal placement of these materials to promote proper drainage and filtration, making it a crucial component of the system.

While the other options may touch upon aspects of the absorption field, they do not specifically outline the primary function of gravel or crushed stones, which is to serve as a cover for the distribution pipe and to support the system's overall efficiency.