What is a perforated pipe used for in a septic system?

A perforated pipe plays a crucial role in the dispersal of treated effluent within a septic system. After the wastewater is treated in the septic tank, it flows into the leach field or drain field, where the perforated pipe is installed. The holes in the pipe allow the effluent to escape and evenly distribute into the surrounding soil.

This process is essential for the further treatment of wastewater as it allows the effluent to infiltrate the soil, where natural microorganisms can break down remaining contaminants, effectively treating the water before it reaches the groundwater. The proper functioning of the perforated pipe ensures that there is no pooling of effluent, which could lead to system failure and environmental contamination.

In contrast, the other options describe functions that do not align with the purpose of a perforated pipe. Holding waste solids, measuring system pressure, and connecting the tank to the house are roles fulfilled by other components within the septic system, such as the tank itself, pressure gauges, and solid pipes, respectively.