July 13, 2024


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Getting to Know Your Submersible Pumps: 8 Common Parts

What is a Submersible Water Pump?

Submersible pumps are highly powerful and common in most construction and industrial applications. They are widely used to move water from wells and other water sources. These water pumps have various parts, and all work differently. You will get a wide collection of heavy-duty water pumps from https://garpen.com.au  that can suit various applications. Understanding how to maintain them is vital to the pump’s effective performance.

Here are common parts of a submersible pump


The motor is a major component of a submersible pump, and changes electrical energy to mechanical energy to propel the pump during operation. When water gets into the motor, it can damage it, and it’s filled to avoid this. The motor may get damaged, requiring repairs or replacement, so to ensure optimal performance, you should conduct regular checks. Also, you should clean all debris and dirt to prevent overheating, and this applies to all water pumps.

The different components of a motor include;

  • Stator- The stator is a stationary part of the motor that generates a magnetic field when electricity flows through it.
  • Windings: Windings are coiled wires on the stator that create a magnetic field when electrical current flows.
  • Rotor: The rotor is the rotating part located inside the motor and causes the motor to spin.
  • Shaft: The shaft connects to the rotor and transfers mechanical energy to the impeller.
  • Bearings: Support the rotor and shaft, allowing them to spin seamlessly and with no friction.
  • Cooling system:  The cooling system prevents the motor from overheating, often through air or liquid cooling mechanisms.

2. Discharge pipe

The discharge pipe is yet another essential component of a submersible pump. It moves water from the pump to the desired location. The pipe comes in varying lengths and diameters, which impacts the pump’s flow rate and pressure. 

A larger diameter pipe is common in heavy-duty pumps. It lowers the frictional losses during operation, enhancing the flow rate. However, a smaller diameter pipe is associated with a lower flow rate due to increased frictional losses.

The discharge pipe will affect the pump flow rate, and choosing the right diameter is key. Discuss this with the manufacturer, and the team will help you in the selection.

To maintain your discharge pipe, inspect it often and check for signs of rust or damage. Have a technician repair or replace the faulty parts with a new one. Also, support the pipe adequately and ensure it doesn’t sag. A bending pipe will exert pressure on the pump, affecting its performance.

3. Check valve

The check valve allows fluid to flow in one direction without backflows. This is vital in maintaining the pressure and preventing contamination or pump damage. The check valve also protects the pump by minimizing the risk of water hammer and damage from pressure surges. To ensure optimal functioning, clean the valve to ensure it’s free from obstructions and replace it when broken or damaged.

4. The impeller

The impeller provides adequate pressure to efficient water circulation through the pump. It features curved blades that spin swiftly, generating centrifugal force. Proper maintenance is vital for optimal functioning of the impeller. If it’s clogged or broken, this will affect its efficiency, and you should inspect it for obstruction and clean it regularly.

 It’s also crucial to avoid cavitation, which occurs when vapor bubbles form and collapse in the fluid. Cavitation can damage the impeller, affecting the pump efficiency. To prevent pump cavitation, examine the pump to identify the cause of the pressure decrease. Position the pump closer to the fluid source and remove bends if possible.

5. Clamps

Clamps are helpful in securing the pump’s power wires and discharge pipe. This helps prevent them from loosening. Loose clamps will affect your water pump in various ways; they can result in leaks in connections between the hoses, leading to cooling loss. Also, they can let air into the cooling system, leading to cavitation.

Loose clamps can also cause overheating due to reduced coolant flow. They will also affect coolant pressure, impacting the system’s ability to maintain adequate temperatures.

Therefore, ensure that the clamps are tightened and secured. In case of worn out clamps, replace them to maintain a solid and secure connection.

6.Torque arrestor

This is a mechanical device in submersible water pumps, mostly in well systems. It plays various functions and hinders the pump from twisting or rotating; it ensures the pump remains steady and enhances its longevity.

It will stabilize and protect the pump and its components, which are against forces generated when starting and running the pump. The torque arrestor features a rubber material and is attached to the discharge pipe. The major functions of the torque arrestor are;

  • It absorbs rotational forces when the pump starts.
  • It reduces rotational forces to stabilize the pump in the casing during operation.
  • Protects the pump wiring and connections, avoiding electrical faults and shorts. This is because excessive movement and twisting can ruin the electrical wiring of the pump.

7.Easy tie adapters

Easy tie adapters are useful in attaching the power cables and the discharge pipe. They should be firmly secured to avoid unsecured connections during operation. Also, they should be inspected regularly for wear and tear. When necessary, replace the adapters to maintain secure connections. 

8.Safety rope

The safety rope is a cable that helps lower the submersible pump into a well when pumping water. It facilitates safe handling and retrieval of the water pump during installation and maintenance. The rope holds the pumps securely, preventing it from falling back into the well or water source. It also helps remove the pump for inspection and other maintenance.

 The rope should be fastened securely and shouldn’t be frayed or weak. If it’s frayed, it should be replaced to ensure safe pump handling and retrieval. 


A submersible pump features different parts, and proper maintenance of each is vital. It’s advisable to schedule routine maintenance to examine all the parts and repair any faulty components. You may be required to replace worn-out parts or the pump altogether. Therefore, acquire the parts of your water pump from a reputable manufacturer to ensure superior quality components and enhanced performance.