How to Choose the Right Water Pump Based on Well Depth: Types, Limits, and Practical Guide
- Apr 8
- 3 min read
Presented by Amindus Consulting and Solutions
Water pumps are essential for drawing water from wells, but choosing the right pump depends heavily on the depth of your well. Selecting an unsuitable pump can lead to poor water flow, equipment damage, or wasted energy. This guide will help you understand the types of water pumps available, their limitations, and how to pick the best one based on your well depth. You will also find practical tips for installation and maintenance to keep your pump running smoothly.
Submersible pump installed in a deep well
Overview of Water Pumps Suitable for Various Well Depths
Water pumps fall into several categories, each designed for specific well depths and applications. The main types include:
1. Shallow Well Jet Pumps
Suitable for wells up to 25 feet deep
Mounted above ground, these pumps use suction to draw water from shallow wells.
They have a jet assembly that helps lift water from the well to the surface.
2. Deep Well Jet Pumps
Effective for wells between 25 and 110 feet deep
These pumps combine a surface-mounted pump with a jet assembly placed down the well.
The jet assembly increases the pump’s ability to lift water from deeper wells.
3. Submersible Pumps
Designed for wells deeper than 25 feet, commonly used for depths up to 400 feet or more
Installed inside the well, submerged in water.
Push water to the surface rather than pulling it, which is more efficient for deep wells.
4. Hand Pumps
Suitable for shallow wells, typically less than 25 feet deep
Manual operation, often used in remote or emergency situations.
Not practical for high flow rates or deep wells.
Limitations of Each Pump Type
Understanding the limits of each pump type helps avoid performance issues.
Shallow Well Jet Pumps
Maximum suction lift is about 25 feet due to atmospheric pressure limits.
Flow rates typically range from 5 to 15 gallons per minute (GPM).
Not suitable for deep wells or wells with low water levels.
Deep Well Jet Pumps
Can lift water from depths up to 110 feet but efficiency drops as depth increases.
Flow rates vary widely, usually between 5 and 20 GPM.
Require precise installation of the jet assembly for optimal performance.
More complex and costly than shallow well pumps.
Submersible Pumps
Can operate at depths exceeding 400 feet.
Flow rates range from 5 to 50 GPM or more, depending on model.
Require electrical wiring inside the well, which can complicate installation.
More expensive upfront but generally more reliable and efficient for deep wells.
Hand Pumps
Limited to shallow depths and low flow rates.
Require manual effort, making them impractical for daily use in most cases.
Useful as backup or emergency pumps.
How to Assess Well Depth and Select the Right Pump
Choosing the right pump starts with knowing your well’s depth and water level.
Step 1: Measure Well Depth
Use a weighted tape measure or a well depth gauge.
Lower the weight until it touches the bottom of the well.
Record the total depth.
Step 2: Determine Static Water Level
Measure the distance from the ground surface to the water level inside the well.
This is the static water level, which can fluctuate seasonally.
Step 3: Calculate Drawdown
Drawdown is the difference between the static water level and the pumping water level.
It indicates how much the water level drops during pumping.
Step 4: Match Pump Type to Depth
For wells less than 25 feet deep, choose a shallow well jet pump or hand pump.
For wells between 25 and 110 feet, a deep well jet pump is appropriate.
For wells deeper than 110 feet, a submersible pump is the best choice.
Step 5: Consider Flow Rate Needs
Calculate your household or irrigation water demand.
Select a pump that can deliver the required gallons per minute at your well’s depth.
Tips for Installation and Maintenance
Proper installation and regular maintenance extend pump life and improve performance.
Installation Tips
Follow manufacturer instructions carefully.
For jet pumps, ensure the jet assembly is installed at the correct depth.
For submersible pumps, use a proper drop pipe and electrical cable rated for submersible use.
Install a check valve to prevent backflow.
Protect electrical connections from moisture.
Maintenance Tips
Inspect and clean pump components regularly.
Check for leaks in pipes and fittings.
Monitor pump pressure and flow rate for signs of wear.
Replace worn parts promptly.
For submersible pumps, avoid running dry to prevent damage.
Winterize pumps in cold climates to prevent freezing.
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