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