When it comes to choosing a pump for your sprinkler irrigation system, two popular options are submersible pumps and monoblock pumps.
I’ve used both on my farm, and each has its own advantages and limitations. The right choice depends on factors like the size of your irrigation area, your water source, and your budget.
In this post, we’ll explore both types of pumps in detail, compare their pros and cons, and help you decide which one best suits your irrigation needs.
What Is a Submersible Pump?
As a name Submersible pump is submerged in a water source, such as a well, pond, or tank.
There are several types of Submersible pumps, but for irrigation two types of them use Borewell pumps and Openwell pumps.
I use an Openwell pump. Which is installed in the river, and to avoid river currents, we use the empty box, which helps to float the submersible pump.
Pros of Submersible Pump
Efficient Water Delivery:
A submersible pump is submerged in the water source located below the ground level or when the water needs to be lifted from a significant depth, making it easy for the pump to work against gravity to lift the water, resulting in lower energy consumption and higher pumping efficiency.
Low Noise Level:
Hence, pumps are submerged in the water, making noise generated during operation minimized, making submersible pumps an ideal choice for residential areas or locations where noise pollution is a concern.
Versatility:
Submersible pumps can be used in various applications, such as irrigation, water supply systems, and dewatering operations, making them a versatile choice for multiple purposes.
Long Service Life:
With fewer moving parts and being submerged in water, submersible pumps tend to have a longer service life compared to other pump types.
Ok, these are all the pros of Submersible pumps, but there are some cons too. Let’s look at them.
Cons of Submersible Pump
Maintenance Challenge:
When a pump is submerged, it is hard to pull out from the water source, which can be time-consuming and costly.
Installation Complexity:
As I explained above, I have to put a box to the pump for floating on the river, so it can be more complex and labor-intensive, especially if the water source is a deep well. It may require specialized equipment and expertise for proper installation and maintenance.
Limited Capacity:
Submersible pumps generally have a lower flow rate compared to other pump types, which may not be suitable for large-scale irrigation systems or applications requiring high water volumes.
Initial Cost:
While operating costs may be lower, the initial cost of purchasing and installing a submersible pump can be higher compared to other pump types.
What Is a Monoblock Pump?
Monoblock Pump or Surface Pump is a type of centrifugal pump designed to be installed above the water source.
It is a single compact unit that combines a pump and motor in a single housing.
I used a monoblock pump on my farm and still use one at home. It’s a versatile and easy-to-install option for irrigation systems.
Pros of Monoblock Pump
Easy to Install:
Monoblock Pumps are easy to install and do not require any special tools and arrangements as for the submersible pump.
Since they are installed above ground, accessing the pump for maintenance or repairs is relatively straightforward.
High Flow Rate:
As compared to submersible pumps, Monoblock pumps can deliver higher flow rates, making them suitable for larger irrigation systems or applications requiring higher water volumes.
Versatility:
Like submersible pumps, monoblock pumps can be used for various applications, including irrigation, water transfer, and pressure boosting systems.
Cost Effective:
Monoblock pumps cost less than the submersible pumps in the initial cost and also installation cost, making them an economical choice for many irrigation systems.
Cons of Monoblock Pump
Limited Suction Limit:
Monoblock Pumps have limited suction lift capacity, meaning they can only draw water from a certain depth, typically around 25 feet (7.6 meters) more or less.
This is the main reason I switched to the submersible pump for my farm. I switch over to the water source that is more than 27 feet deep.
Noise and Vibration:
Monoblock pumps make noise. Not initially, but as they get older and older, they can generate more noise and vibration compared to submersible pumps, which may be a concern in residential or noise-sensitive areas.
Energy Efficiency:
Monoblock pumps may be less energy-efficient than submersible pumps, especially when lifting water from deeper sources, as they need to work against gravity to draw the water up.
Exposure to Elements:
Monoblock pumps installed above the ground make them exposed to all kinds of weather phenomena and may require additional protection or housing to prevent damage or premature wear.
Ok, now you have an understanding of what submersible and monoblock pumps are and their pros and cons, let’s move on to the differences between them.
Difference Between Submersible and Monoblock Pumps
| Differences | Submersible Pump | Monoblock Pump |
|---|---|---|
| Placement and Installation | The Submersible Pump is submerged in the water and pushes water into the surface. | Monoblock pump is installed above the ground to pull the water through suction. |
| Capacity | Submersible pumps have to have high water volume for flow rate. | Monoblock pumps have a higher flow rate and are suitable for large irrigation systems. |
| Energy Efficient | Submersible pump does not require to work against gravity to lift the water, resulting in lower energy consumption and higher pumping efficiency. | Monoblock pumps have to do extra work especially when lifting the water from the deeper source making them less energy efficient. |
| Suitable Water Source | Submersible pumps are suitable for the deep well, lakes or underground water source. | Surface pumps are best suitable for shallow water sources like rivers and streams. |
| Initialization Cost | Operating cost and maintenance is lower, however, initializing a submersible pump cost you higher. | Monoblock pumps provide a simpler and cost-effective solution for immediate water supply needs. |
| Noise and Vibration | Since submersible pumps are submerged in the water making less or no sound. | Monoblock pumps are on the surface making the noise. |
Now you have the understanding of both pumps, their pros and cons, and how they differ from one another, but when it comes to buying decisions, consider some of the factors below.
Factors to Consider When Choosing Between Submersible and Monoblock Pumps
Water Source Dept:
If your water source is located deep underground, such as a deep well, a submersible pump may be the better choice as it can efficiently lift water from greater depths.
Installation and Maintenance:
Considerations: If easy installation and maintenance are priorities, a monoblock pump may be the preferred option as it is installed above ground and more accessible.
Budget:
While submersible pumps may have lower operating costs due to their energy efficiency, monoblock pumps are generally more affordable in terms of initial purchase and installation costs.
Longevity and Reliability:
Submersible pumps tend to have a longer service life and may be more reliable in the long run, but proper maintenance is crucial for both pump types.
Final Thoughts…
Choosing between a submersible pump and a monoblock pump for your sprinkler irrigation system depends on your specific needs, water source, budget, and maintenance preferences.
Consulting with irrigation professionals or experienced contractors can help you make the most informed decision for your farm or garden.
Now that you have a clear understanding of both pumps, which one do you think is best suited for your irrigation system?
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