What is the low water level requirement in an ejector basin?

The low water level requirement in an ejector basin being at least 6 inches above the bottom of the basin is established to ensure the proper operation of the pump. This distance allows for adequate submergence of the pump intake, which is critical for preventing cavitation and ensuring consistent flow rates.

When the water level is maintained at this height, it helps to prevent the pump from running dry, which could lead to mechanical failure or damage. Additionally, having the water level set at this height allows for a buffer zone, accommodating fluctuations in water levels due to inflow or pump cycles, and ensures that the pump maintains optimal efficiency during its operation.

This standard is often prescribed in plumbing codes and best practices to enhance the longevity and reliability of sewage and drainage pump systems.