What is the primary purpose of a pressure distribution system in septic installations?

The primary purpose of a pressure distribution system in septic installations is to apply effluent uniformly over the absorption area. This method enhances the performance and efficiency of the septic system by ensuring that the treated wastewater is evenly spread across the soil.

Uniform distribution helps to prevent localized saturation of the soil, which can lead to ponding and potential failure of the system. By applying effluent evenly, the system can effectively utilize the available soil to treat wastewater, as it allows for better oxygenation and microbial activity necessary for the decomposition of organic matter.

This approach optimizes the absorption field's capacity, minimizes the risk of clogging, and promotes a healthier environment by ensuring that the effluent is adequately filtered through the soil before it reaches the groundwater. Thus, the correct answer emphasizes the importance of even application of treated effluent to sustain a functional and effective septic system.