Dredging pipes, the ancient Indus systems of sewerage and drainage that were developed and used in cities throughout the civilization were far more advanced than any found in contemporary urban cites in the Middle East and even more efficient. The function of the field drainage system is to control the water level, whereas the function of the main drainage system is to collect, transport, and dispose of the water through an outfall or outlet. In some instances one makes an additional distinction between collector and main drainage systems. Drainage pipe plays a vital role here. There are several are several drainage components that are fairly common in most drainage systems.