Today, centrifugal pumps are used to pump fluid such as water, chemicals, and oil in several industrial applications. But as with other mechanical systems, these pumps can sometimes stop working or run inefficiently due to many reasons. Here are a few common problems that indicate your centrifugal pump needs repair service and how the repair work can be done.  

Pump won't start

This is perhaps the surest sign that your pump needs to be repaired. If your centrifugal pump won't start, the problem is most likely caused by electrical failure. This means that electrical current is not able to flow through the system, and therefore the pump will not run.  There are several possible reasons for this. The electrical wiring could be loose or broken, the fuse or circuit breaker could be blown, the motor could have shorted out or there could a hard foreign object stuck in the impeller.

Any loose wiring will be tightened while disconnected wiring will be reattached. Blown circuit breakers and motors will have to be replaced. Anything lodged in the impeller that may be preventing it from rotating will be removed. 


Having a leakage in your pump system is a sure indication of trouble. The leakage may be caused by excessive fluid temperature or pressure that could have resulted in valve failure or pipe rupture. Also, the mechanical joints used to connect various components of the pump system could have been loosened due to abnormal thermal or pressure differential existing across around the joints, thus causing the leakage.

Pump repairs for faulty mechanical joints may involve either tightening any loose fasteners or replacing gaskets, if they are weakened by corrosion. If your pump leaks at the shaft, the mechanical seal will have to be replaced to stop the leaking. Cracked pump pipes will need to be replaced to ensure fluid flows at maximum efficiency.

Poor fluid flow

If there little or no discharge at all when you run your pump and the discharge valve is open, then it is likely that your pump may be clogged. The clog might be caused by an air leak in the suction line. This occurs when the suction piping is either too large or too small. To fix this problem, the pump inlet size will have to be increased or decreased so as to match pump flow to fluid capacity.

Aside from that, the impeller could have been damaged, thus failing to provide the pressure needed to pump fluid through the system. In this case, the defective impeller will have to be removed and replaced. Contact local professionals, such as those from, for further assistance.