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18 Best Submersible Pumps of 2021

Back in the days, just the mere installation of a submersible pump was costly, let alone buying one of the best submersible pumps. So for small household owners, this was nothing but a luxury. However, that’s not the case anymore. In the world you and I live in today, devices like these are now being manufactured in all kinds of sizes, shapes, etc. The price range is also very broad. So every commercial and residential property now can benefit from a swift water flow. So here are the top choices and everything you might want to know about submersible pumps…


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Submersible Pump - What Is It?

Submersible pumps are devices with an integrated motor that’s hermetically sealed. This motor is attached to the pump, which is plunged in water for pumping. You can call a submersible pump an electric submersible pump as well i.e. ESP.

Submersible Pump - How It Works?

Now let me tell you how a device like this works. To be honest, understanding the way a submersible pump works isn’t complicated. And you don’t have to be a technically sound person or professional to be able to comprehend what happens inside the machine.

What the pump does is transforms kinetic energy into rotational energy. And it does so with the help of pressure energy getting directly pulled via the pump. Water traveling through the pump moves via the intake. And then it passes through impeller rotation to enter the diffuser section. Finally, water moves toward the surface to be used for various purposes.

The pump should be completely submerged in water at all times. Otherwise, internal hardware problems, overheating, and the like start to take form.

Another thing you may want to know is that submersible pumps can be used for different purposes. There are the best submersible pumps for agriculture that allow draining water from a large field.  Then you can also maintain oil wells, sewage, etc.

Submersible Pump - Different Types

1. Borewell Pumps

These types of submersible pumps are placed into the ground for borewells. The body of the device is attached to the motor to provide running underwater. Once they start to work, complete water immersion is necessary to keep the machine functioning.

The pump design, in this case, is long and vertical. It’s primarily used for purposes like agriculture, industry, and lower ground-level water area.

2. Openwell Pumps

This kind is plunged into the water completely with an airtight seal. The structure is horizontal, which makes the pump perfect for an open tank or well. So it’s the best for apartments, gardening, underground tanks/reservoirs, etc.

Submersible Pump - Important Terms for Buying

  • Head Length

How high up can the pump lift water - that’s the head length. The number should be greater of course when the height of the water lift is higher. And the other way around.

So does that mean a greater pressure rating too (measured in units of feet or meters) if the head length is higher? Yes, of course.

  • Borewell Size

The borehole diameter - that’s where the submersible pump is placed. Needless to say, the borehole size should be lower than the diameter of the pump.

  • Discharge Rate

It’s the quantity of water getting pumped per minute. In the case of a larger area or when pumping more water, the higher the discharge rate the better.

  • Suction Power

The best submersible pumps deliver exceptional suction power, which makes this particular factor a crucial one. But keep in mind that a higher suction means a higher electric bill. These types of submersible pumps are also more expensive.

  • Stage

The pumping stage is equal to how many impellers are employed in the submersible pump. For example, the 8-stage pump uses 8 impellers to generate high water pressure. So as the impellers keep increasing, the device’s head length also increases.

  • Impeller Material

Before you buy any submersible pump, make it a point to check the material used for the impeller. The role of the impeller is to effectively and forcefully push water, right? So to ensure unhindered, long-lasting performance, the material should be solid.

By far, brass impellers are the most praiseworthy in that regard. Then there other options like plastic, aluminum, brass, bronze, steel, and cast iron.


Frequently Asked Questions

What is the difference between a water-filled and an oil-filled submersible pump?

Let’s start with oil-filled submersible pumps…

  • The motor contains oil.
  • Wire winding consists of aluminum and copper.
  • More expensive and high cost for maintenance.
  • Ideal for large households and agriculture (daily need is over 5,000 liters of water).

As for the water-filled version…

  • The motor contains water.
  • Wire winding consists of PVC-coated copper wire.
  • More affordable and less cost for maintenance.
  • Ideal for small households (daily need is 5,000 liters of water).

What type of motor works the best for borewell?

Submersible pumps, on the whole, are very efficient when it comes to directly pumping water from the surface. So make sure that the motor of the device works highly efficiently like this. It should consume less electricity while also not overheating when submerged in water.

What is a single-phase submersible pump?

Single-phase motors are more suitable for household or residential purposes. These types of submersible pumps load power below 1000 watts. This means a single-phase motor is ideal for smaller appliances.

How deep to place a submersible pump in a well?

The range of depth should be anywhere between 25 and 400 feet. The goal is to place the pump deep enough inside the well for discharging higher water levels.


Conclusion

Problems related to water scarcity are on the rise. And the growing population isn’t making anything easier. So households and even industrial areas are becoming more and more dependable on devices like submersible pumps. That is why advanced technology is such a huge part of the world we live in today.

Farmers have, for a very long time, depended on these submersible pumps placed into borewells for the purpose of irrigation. But now even urban areas reap the benefits, so there’s no reason why you can’t get on too.

Just make sure you’ve got the terms and features right. Understanding how submersible pumps work is crucial when it comes to buying the most suitable one for your specific water supply needs.