What is the function of a diverter valve in sewage transfer systems?

The function of a diverter valve in sewage transfer systems is primarily to change the direction of flow. Diverter valves are designed to redirect the flow of sewage from one pipeline to another or to isolate different sections of the system. This capability is crucial for maintenance, servicing, and managing the flow in complex sewer networks.

By changing the direction of flow, diverter valves ensure that the sewage can be directed to the appropriate treatment facilities, can be bypassed during maintenance, or can be routed effectively in response to system demands or blockages. This operational flexibility is vital for maintaining efficient sewage management and preventing overflows or backups in the system. Thus, the correct answer emphasizes the essential role of diverter valves in controlling and managing the flow in sewage systems rather than focusing on other functions such as pressure increases, filtering, or monitoring fluid levels.