How Submersible Pumps Work: Submersible Pump Advantages and Disadvantages

Published On: July 31, 20204 Comments on How Submersible Pumps Work: Submersible Pump Advantages and DisadvantagesTags: Last Updated: February 11, 20244.1 min read

A submersible pump is useful to pump and move liquids from one point to another.  The motor of the pump is sealed and close-coupled to the pump body.  It pushes the water to the surface with speed. The enclosure around the engine is waterproof and filled with oil to prevent rust and short circuits. The submersible pump submerges into the liquid during the pumping process. It is a very efficient way of drawing fluid, and the pump prevents overheating by the fluid around it. This pump converts rotary energy into kinetic energy, and there is no chance of a spike in the pump. They can fit into many areas without the issue of space. Their design makes them a suitable option for confined spaces.

How Submersible Pumps Work

Listed below are a few advantages and disadvantages of submersible pumps or sump pumps:

Advantages of Submersible Pumps


The main advantage of submersible pumps is that they are self-priming and do not need regular maintenance or liquid handling. It is kept cool by the fluid surrounding it, and the design feature is a plus point for users. The heavy-duty design of the pump allows it to distribute the pumping. There is an extra bearing in the pump apart from the motor bearing. Self-priming pumps have separate shafts and are easy to maintain.


The notion of cavitation is a reality for all kinds of pumps. Cavitation occurs when the pressure of the liquid being pumped drops to a below-normal or critical level. Submersible pumps are not prone to cavitation and save irregular physical damage. It is necessary to hire a professional for the submersible water pump installation to protect the pump from cavitation, and other issues. The installation process requires a check on the depth on the water level and pumping level. Other factors like friction and size of pipes are also important.


A submersible pump needs less energy to draw water into the pump and is very energy efficient. The head pressure of the liquid uses kinetic and pressure energy to operate. Due to the width of the diffuser inlet in the submersible pump, the pump’s performance increases. These pumps are used widely in irrigation, sewage disposal, and urban drainage. The diffuser and impeller in the submersible pumps maximize their effectiveness by stabilizing the pump’s fluid flow. Apart from the artificial lift ability of the pump, it is also space-efficient.  There are almost no chances of hurting yourself while handling this pump because of their deep-down installation.


The submersible pumps submerge under the liquid, and the water and pit walls soften the noise to a much greater extent. If your pump is operating in perfect condition, then you will not hear any sound. Although noisy spitting faucets mean something is wrong with your pump. Check your water pump shaft for fixing the noise.

Low Maintenance

The close design is one of the reasons behind the low maintenance of submersible pumps. Overheating is also not an issue in these pumps because the liquid around it cools it down. You can check the pump control box with electrical meters for any possible questions and then remove the pump for repair if it is necessary.

How Submersible Pumps Work - pump

Disadvantages Of Submersible Pumps

Shorter Lifespan

The submersible pumps have a shorter lifespan because they are not easily accessible, and the only way you know if there is a problem is when the pump stops working.  Because they are mounted underwater, therefore, it becomes hard to inspect them daily. Preventive maintenance is not possible and leads the pump to a breakdown.

Seal Issues

They fit in a confined space, and when the seal of the pump starts wearing off, you are unable to see the issue immediately. Liquid starts seeping through the seal into the pump, and the cable gland also wears off. These minor issues can cause a voltage leakage, and the motor slips easily.

Limited Usage

Submersible pumps are unable to handle heavy and solid waste that comes with the liquid. The impeller of the pump stops working when particles do not break easily. With the solids stuck in, the impeller corrosion begins, and it breaks the motor. The pumps made of corrosion-resistant material can bear this pressure.

The Final Word

The submersible pump draws liquid from one point to another by using the head. It can lift water rather than pulling it to the surface. It is made of heavy-duty design to prevent short circuits and other issues. The seal is airtight and protects the motor from the liquid it is submerged in. You can use these pumps for residential, commercial, and industrial use. With advantages, these pumps also have disadvantages like low lifespan, difficult accessibility, and repair. Submersible pumps are self-priming, and to ensure proper operation, they need regular care.

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  1. Vivian Black November 3, 2021 at 1:24 pm

    Well pumps seem more complicated than I thought. They are important, though because the water is less tainted. Submersible pumps are self-priming. This is good. However, since they are difficult to repair, it is best to get a professional construction company to help out.

  2. Bea A October 5, 2021 at 6:50 am

    It sure was nice to know that submersible pumps require less maintenance due to their close design, and overheating is also not an issue in these pumps. This would be a great tip for my sister who wanted the wastewater in her house processed and treated properly. I could imagine how much money she could save with the right wastewater pump.

  3. Charlotte Fleet April 30, 2021 at 8:58 pm

    It was good to learn that submersible pumps are very low maintenance. My dad needs to buy a new pump for our well. I will have to suggest that he find a submersible pump.

  4. Shammy Peterson April 30, 2021 at 6:44 am

    You got me when you said that submersible pumps can lift water rather than pulling it to the surface to prevent short circuits and other issues. With this in mind, I will be sure to consider shopping for a pump and a sucker rod as well to ensure that we have something at home that we can use to ensure safety. We have a swimming pool and a water well at home that we need to ensure won’t cause short circuits. Thanks!

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