These are not waters particularly laden with solid residues, or with residues of small dimensions that do not create problems in the piping passage of the submersible pump.
Dirty waters or wastewaters include rainwater, runoff from fields or provenance both from civil circles and from industrial processes provided free of substances requiring special treatment by submersible pumps or of a purification plant.
The dirty waters have to be directed to the sewer through the use of specific submersible electropumps.
