length of the unit is more

efficiency is more

suction pipe is not there

diameter of the unit is smaller

Reciprocating pump

Jet pump

Submersible pump

Centrifugal pump

The pump supplies too much water

The pump does not supply water

The pump motor runs too hot

The fuse in the motor circuit blows out

Level of water in sumps is too high

Impeller damaged

Pump is running in reverse direction

Motor running fast due to higher frequency

Initial cost high

Diameter is small

Requires skill for erection

In case of defect entire unit is to be lifted