What are the Reasons why a Submersible Fountain Pump can Fail?

Submersible pumps are designed to be entirely submerged in water to enable an effective pumping solution. These are crucial for ponds and water fountains. However, submersible pumps may occasionally malfunction, leading to significant downtime and affecting water circulation in the pond. Let us see what might be the causes of submersible pump failures and understand how you can fix them after you buy these water fountains pumps.

Lack of Maintenance

Regular maintenance is vital for submersible pumps to operate smoothly. Ignoring maintenance may significantly affect the performance of the pump since the accumulated debris and dirt may choke the pump, pipelines, and impellers, leading to lower performance and blockages. Most submersible fountain pumps these days are magnetic drive systems, requiring little maintenance. But you do need to check the impeller and impeller cavity now and then the make sure the impeller is not obstructed or stuck. You can inquire with the supplier about the maintenance of the pump when you buy water fountains pumps.


This is one of the most common causes of pump failure and happens when the pump is exposed to operating circumstances that exceed its specified capacity. Using the pump beyond its capacity can place undue strain on the impellers and the motor, thus leading to premature wear and possible failure. The increased flow rate and pressure can cause cavitation, resulting in erosion of impellers and reduction of pump efficiency. The most common cause is overheating. This can happen when the impeller does not turn freely inside the impeller cavity.

So, to overload, you need to understand the pump’s capacity and use it within the specified limits. You may also monitor the system’s requirements and ensure proper sizing and matching of the pump to the application. This can prevent overloading and extend the pump’s lifespan.

Electrical problems

This can significantly impact the performance of a submersible pump. Issues with the power supply, like faulty wiring and insufficient voltage, can lead to motor overheating and burnout. Short circuits and electrical surges can also damage the motor and other electrical components, thus leading to pump failure. Such problems can be caused due to power fluctuations, improper grounding, and faulty wiring. Lightning strikes can also damage or ruin the pump.

These electrical issues can be prevented by proper electrical installation and ensuring appropriate wiring and voltage compatibility. Longer cable runs require thicker gauged cable. Also, regular inspections and maintenance of electrical connections and components can help you identify and address potential problems before they escalate.

Water Quality

Impurities in water, like sand, chemicals, or silt, can cause corrosion and erosion of pump components, leading to leaks, reduced efficiency, and pump failure. Fouling and scaling impellers and pipes can restrict water flow, thus increasing the pump’s workload and decreasing the lifespan. It is important to install adequate water filtration and treatment technologies to avoid this. Regular cleaning and monitoring of the pump components can help reduce the impact of water contaminants and ensure maximum pump performance and durability.

Inappropriate Pump Installation

This can lead to various complications that can result in pump failures. Inadequate priming and venting can generate airlocks, thus preventing it from functioning properly. Misalignment of pump components can lead to excessive vibration and early wear. The misalignment of pump components can cause mechanical breakdown. These concerns can be prevented by following suitable installation procedures and standards. This may include appropriate priming, providing enough support to minimize additional stress, and positioning the components properly.

Winding Up

Understanding the possible reasons for pump failure is important to ensure effective and dependable operations in many sectors. Critical preventive measures include appropriate installation, regular maintenance, and proper pump selection.

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