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What Kind of Pump Do I Need for a Deep Well?

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Accessing a reliable water source is a priority for many remote homeowners, farmers, and industrial managers. When municipal water isn't an option, a well becomes your lifeline. However, drilling the hole is only half the battle. To actually bring that water to the surface, you need the right equipment.


Choosing the incorrect pump can lead to low water pressure, high energy bills, and even premature system failure. If your water source is more than 25 feet underground, a standard suction pump simply won't cut it. You need a dedicated pump for deep well applications.


This guide will walk you through the specifics of deep well pumps, the different types available, and how to select the perfect model for your specific depth and water usage requirements.


Understanding the Difference: Shallow vs. Deep Wells

Before browsing catalogs, you must confirm the depth of your water source. Pumps are generally categorized by how they move water: suction or pressure.

  • Shallow Wells (Less than 25 feet): These usually employ centrifugal or shallow well jet pumps. They sit above ground and act like a straw, sucking water up the pipe. Atmospheric pressure limits how high they can lift water, maxing out around 25 feet.

  • Deep Wells (25 to 400+ feet): Once you go deeper than 25 feet, suction is no longer physically possible. You need a mechanism that pushes water up from the bottom rather than pulling it from the top. This is where the deepwell water pump comes into play.

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Types of Deep Well Pumps

While there are a few variations, the market is dominated by two main technologies for deep water extraction: the submersible pump and the jet pump.


1. Submersible Pumps (The Gold Standard)

For most modern residential and agricultural applications, the submersible pump is the superior choice. As the name suggests, this entire unit (pump and motor) is submerged deep inside the well water.


Because they are submerged, they don't need to be primed (filled with water) before use. They use a series of impellers to push water up the pipe. Manufacturers like Ruirong Pump specialize in these units, offering various sizes such as 4-inch, 6-inch, and 8-inch models to fit different well casings.


Pros:

  • Highly efficient (uses less energy to move more water).

  • Quiet operation (the noise is underground).

  • Long lifespan (often 15 to 25 years).

  • Self-priming.

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2. Deep Well Jet Pumps

Jet pumps sit above ground (usually in a well house or basement). For deep wells, they utilize two pipes: one to draw water up and a second to push some water back down into an ejector assembly to help lift the column of water.


Pros:

  • Easier to access for maintenance (since the motor is above ground).

  • Generally cheaper upfront cost.

Cons:

  • Significantly less efficient than submersibles.

  • Requires priming.

  • Limited depth capability compared to submersibles.

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3. Solar Water Pumps

For remote locations without reliable access to the electrical grid, a solar deep well pump is a game-changer. These systems utilize DC motors powered directly by photovoltaic panels. Ruirong Pump offers specific solar solutions, including screw pumps and impeller pumps, designed to operate efficiently on solar energy alone.


Key Factors When Selecting Your Pump

Knowing the type of pump is the first step. Next, you need to size it correctly. Installing a pump that is too small will result in a trickle of water, while a pump that is too powerful can run dry and burn out.


Consider these four critical factors:

1. Well Depth and Static Water Level

You need to know the total depth of the well, but more importantly, the static water level. This is the distance from the ground surface to the water when the pump is not running.

  • Total Head: This is the vertical distance the pump must lift the water plus the pressure required at the top (for your tank or sprinklers).

2. Flow Rate (GPM)

Flow rate is measured in Gallons Per Minute (GPM). A typical 3-to-4-bedroom home usually requires 8–12 GPM to ensure you can run a shower and the dishwasher simultaneously without losing pressure.

3. Well Casing Diameter

Your pump must fit physically inside the well. The standard residential well casing is 4 inches or 6 inches in diameter. Ruirong Pump, for example, provides 4-inch stainless steel deep well pumps that are industry standards for resistance to corrosion and durability. Always check the diameter of your well casing before buying.

4. Power Source

Are you connecting to the main power grid (AC) or using solar (DC)?

  • AC Power: Check if you have single-phase or three-phase power available. You must also match the voltage (110V vs. 220V) and frequency (50Hz vs. 60Hz).

  • DC Power: If utilizing solar, ensure your pump is compatible with your panel setup.


pump for deep well


Comparison: Choosing the Right Pump for Your Depth

Use this table to quickly identify which technology suits your situation best.

Well Depth

Recommended Pump Type

Why?

0 – 25 Feet

Shallow Well Jet Pump

Economical and easy to install for surface water.

25 – 110 Feet

Deep Well Jet Pump

Viable if you prefer the motor above ground, but less efficient.

25 – 400+ Feet

Submersible Pump

The most efficient option. Pushes water effectively from great depths without losing pressure.

Remote / Off-Grid

Solar Submersible Pump

Operates independently of the power grid; ideal for livestock or remote irrigation.


Why Stainless Steel Matters

When you drop a piece of machinery hundreds of feet underground, you want it to stay there. Retrieving a broken pump is expensive and labor-intensive. This is why material selection is vital.


Cheaper pumps often use plastic or cast iron components that can rust or degrade over time. High-quality options, such as the 316L anti-corrosion submersible pumps from Ruirong Pump, are crafted from full stainless steel. This makes them resistant to sandy water and mineral corrosion, significantly extending the life of the unit.


Installation and Maintenance Tips

Once you have selected your deepwell water pump, proper installation ensures longevity.

  1. Use a Torque Arrestor: Submersible pumps can twist when they start up. A torque arrestor protects the pipe and wire from rubbing against the well casing.

  2. Install a Check Valve: This prevents water from flowing back down into the well when the pump turns off, which keeps the system primed and pressurized.

  3. Protect the Motor: If you live in an area with fluctuating power, install a control box with surge protection.

  4. Test the Water: If your water has high sand content, consider a pump specifically designed for handling solids or install a screen to prevent the impellers from jamming.

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Securing Your Water Supply

Selecting the right pump is about balancing your water needs with the physical reality of your well. For depths exceeding 25 feet, a submersible pump is almost always the correct answer due to its efficiency and reliability.


Whether you need a standard 50Hz submersible motor or a specialized solar-powered system for an agricultural project, choosing a reputable manufacturer is key. Companies like Ruirong Pump have spent decades refining pump technology, offering robust stainless steel solutions that withstand the harsh conditions of deep well operations.


By understanding your well depth, required flow rate, and power options, you can choose a system that provides consistent, clean water for years to come.

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