A gauge will indicate a leak with a drop of pressure.

For such liquids as gasoline, the suction line can be tested by shutting off or plugging inlet and putting the line under pressure. If liquid pumped is water, test flanges for leakage with flame or match. Make sure the rotor is spinning in the correct direction when the pump is in operation.ĭisassemble the pump and volute to clear the rotor jam or clog. If the static lift is too high, you’ll need to lower the pump closer to the source material or raise the material closer to the pump.Ĭheck pipe friction losses, use larger discharge pipes.Įnsure the motor is receiving the required voltage and correct frequency if using a variable frequency drive.Ĭheck the motor rotation direction as indicated by arrows on the pump casing. If you suspect air in the pump, make sure to vent volute/casing to remove trapped air before resuming pumping.Ĭheck the pipeline for friction losses and ensure the static lift is not too high.

If any air is trapped in the pump, it will not operate correctly.Ĭheck for leaks in the pump, pipeline, and couplings which could cause air to enter the pump. Ensure the pump and volute are completely full of liquid before operating the pump.

Trash pump and dredge pump