Submersible Pump Flow Rate: Complete Sizing Guide

The Correct Submersible Pump Flow Rate Must Meet Peak Water Demand Without Exceeding The Well’s Sustainable Yield Or Pushing The Pump Outside Its Recommended Operating Range.

Flow Rate Alone Cannot Determine Pump Size. Buyers Must Select The Pump At Both The Required Flow And Total Dynamic Head.

An Oversized Pump Can Cause Excessive Drawdown, Sand Production, Motor Overload, High Pressure, Water Hammer, And Frequent Cycling.

An Undersized Pump Can Produce Low Pressure, Insufficient Irrigation Coverage, Slow Tank Filling, And Unreliable Water Supply.

What Is Submersible Pump Flow Rate?

Submersible Pump Flow Rate Is The Volume Of Water The Pump Delivers During A Specific Time.

Common Units Include:

• Liters Per Minute
• Liters Per Second
• Cubic Meters Per Hour
• Gallons Per Minute
• Cubic Feet Per Second

Flow Rate Is Often Represented By The Letter Q On A Pump Curve.

A Pump’s Actual Flow Depends On:

• Pump Design
• Number Of Stages
• Rotational Speed
• Total Dynamic Head
• Pipe-Friction Loss
• Valve Position
• Water Level
• Motor Frequency
• Impeller Condition
• System Demand

The Flow Printed In A Model Name Is Usually A Nominal Rating, Not A Guaranteed Flow Under Every Condition.

Common Flow-Rate Conversions

Useful Approximate Conversions Include:

• 1 m³/h = 16.67 L/min
• 1 m³/h = 4.40 GPM
• 1 L/s = 3.6 m³/h
• 1 L/s = 15.85 GPM
• 1 GPM = 0.227 m³/h
• 1 GPM = 3.785 L/min

For Example:

20 m³/h × 4.40 = 88 GPM

And:

50 GPM × 0.227 = 11.35 m³/h

Use One Consistent Unit Throughout The Pump-Selection Process.

Rated Flow Vs. Actual Flow

Rated Flow

/Rated Flow Is A Manufacturer-Selected Point On The Pump Curve.

The Pump May Operate Most Efficiently Near This Point, Depending On Its Hydraulic Design.

Maximum Flow

Maximum Flow Is The Highest Flow Permitted Or Shown For The Pump Under Defined Conditions.

It Usually Occurs At Low Head.

Operating Continuously Near Maximum Flow Can Cause:

• Motor Overload
• Excessive Drawdown
• Upthrust
• Low Efficiency
• High Pipe Velocity
• Sand Production
• Cavitation Risk In Some Systems

Minimum Flow

Minimum Flow Is The Lowest Recommended Continuous Flow.

Operating Below Minimum Flow Can Cause:

• Internal Recirculation
• Water Heating
• Vibration
• Bearing Stress
• Unstable Hydraulic Forces
• Poor Motor Cooling

Actual Operating Flow

Actual Flow Occurs Where The Pump Curve Intersects The System Curve.

Therefore, A Pump Rated For 20 m³/h Will Not Always Deliver 20 m³/h.

It May Deliver More Or Less Depending On System Head.

Why Total Dynamic Head Changes Pump Flow

A Centrifugal Pump Produces Different Flow At Different Head Values.

As Total Dynamic Head Increases, Pump Flow Usually Decreases.

As Total Dynamic Head Decreases, Pump Flow Usually Increases.

Total Dynamic Head Includes:

• Pumping Water Level
• Vertical Elevation
• Required Outlet Pressure
• Pipe Friction
• Fitting Losses
• Filter Losses
• Valve Losses

Always Select A Pump At A Complete Duty Point.

For Example:

Required Duty Point = 15 m³/h At 80 Meters TDH

A Pump With A Maximum Flow Of 15 m³/h May Not Deliver That Flow At 80 Meters.

What Determines Required Pump Flow?

Required Flow Depends On The Application.

Common Factors Include:

• Peak Simultaneous Demand
• Daily Water Volume
• Available Pumping Hours
• Storage Capacity
• Irrigated Area
• Crop Water Requirement
• Number Of Users
• Number Of Fixtures
• Industrial Process Demand
• Fire-Protection Requirements
• Well Yield
• Seasonal Variation
• Future Expansion

The Correct Design Method differs between residential, agricultural, commercial, industrial, And municipal systems.

How To Calculate Residential Water Demand

Residential Pump Flow Should Support A Reasonable Number Of Simultaneously Operating Fixtures.

Possible Water Uses Include:

• Showers
• Bathroom Faucets
• Kitchen Faucets
• Toilets
• Washing Machines
• Dishwashers
• Garden Irrigation
• Outdoor Taps

Do Not Automatically Add The Maximum Flow Of Every Fixture. Residential systems rarely use all fixtures simultaneously.

Professional Design Usually Applies A Diversity Or Fixture-Unit Method According To Local Plumbing Codes.

The EPA WaterSense Bathroom Faucet Guide Notes That Labeled Bathroom Faucets Use No More Than 1.5 GPM. However, Actual Fixture Rates And Local Standards Vary.

Residential Flow Example

Assume A House May Use The Following Fixtures Simultaneously:

• One Shower: 2.0 GPM
• One Bathroom Faucet: 1.5 GPM
• One Kitchen Faucet: 2.0 GPM
• One Toilet Filling: 2.0 GPM
• One Outdoor Tap: 5.0 GPM

Estimated Simultaneous Demand:

2.0 + 1.5 + 2.0 + 2.0 + 5.0 = 12.5 GPM

The Designer Might Evaluate A Pump Near 12 To 15 GPM, Depending On Well Yield, Pressure, Storage, And Local Requirements.

These Values Are Only An Example. Use Actual Fixture Data.

How To Calculate Daily Water Volume

Daily Volume Is Important When The Water Source Has Limited Yield Or The System Uses Storage.

Use:

Daily Water Volume = Number Of Users × Water Use Per User

Then Add:

• Irrigation Demand
• Livestock Demand
• Cleaning Water
• Process Water
• Leakage Allowance
• Seasonal Demand

Local Consumption Patterns Can Vary Significantly.

How To Calculate Flow From Daily Volume

If The Required Daily Volume Is Known:

Required Flow = Daily Water Volume ÷ Available Pumping Hours

For Example:

• Daily Water Requirement: 120 m³
• Available Pumping Time: 8 Hours

120 m³ ÷ 8 Hours = 15 m³/h

The Pump Should Therefore Deliver Approximately 15 m³/h At The Required TDH.

However, The Well Must Sustain This Flow.

How To Calculate Agricultural Irrigation Flow

Agricultural Flow Depends On:

• Irrigated Area
• Crop Water Requirement
• Soil Type
• Irrigation Efficiency
• Climate
• Pumping Hours
• Irrigation Method
• Zone Quantity
• Available Water

A Useful Relationship Is:

1 Millimeter Of Water Over 1 Square Meter = 1 Liter

Irrigation Calculation Example

Assume:

• Irrigated Area: 5 Hectares
• Area In Square Meters: 50,000 m²
• Required Gross Application: 5 Millimeters Per Day
• Available Pumping Time: 10 Hours Per Day

Daily Water Volume:

50,000 m² × 5 Liters Per m² = 250,000 Liters

Convert To Cubic Meters:

250,000 Liters = 250 m³

Required Flow:

250 m³ ÷ 10 Hours = 25 m³/h

The Pump Must Deliver Approximately 25 m³/h At The Required Pressure And Elevation.

If 5 Millimeters Represents Net Crop Demand Instead Of Gross Pumped Water, The Designer Must Account For Irrigation Efficiency And Distribution Losses.

The Agricultural Applications Of Deep Well Submersible Pumps Guide Explains Additional Irrigation Requirements.

Irrigation Flow And Pumping Capacity

Irrigation Pumping Capacity Can Also Be Expressed As Flow Per Unit Area.

For Example:

• Pump Flow: 500 GPM
• Irrigated Area: 100 Acres

500 GPM ÷ 100 Acres = 5 GPM Per Acre

The NDSU Irrigation Pump Guide Explains That Irrigation Pump Selection Depends On Flow, Total Dynamic Head, And Pump Efficiency.

How To Calculate Livestock Water Flow

Livestock Systems Should Consider:

• Animal Quantity
• Daily Consumption Per Animal
• Peak Drinking Period
• Trough Refill Time
• Seasonal Temperature
• Cleaning Demand
• Storage Tank Capacity

Use:

Daily Volume = Animal Quantity × Daily Consumption Per Animal

Then Determine Whether The Pump Must Supply Peak Demand Directly Or Refill A Storage Tank Over Several Hours.

A Storage Tank Can Reduce The Required Instantaneous Well-Pump Flow.

How To Calculate Commercial Building Flow

Commercial Systems Should Consider:

• Building Occupancy
• Fixture Quantity
• Peak Usage Period
• Fire Requirements
• Irrigation Demand
• Cooling Equipment
• Cleaning Water
• Process Demand

Use Local Plumbing Codes And Approved Fixture-Unit Methods.

Hotels, Schools, Hospitals, And Factories Have Different Demand Patterns.

How To Calculate Industrial Flow

Industrial Applications Should Separate:

• Continuous Process Demand
• Intermittent Demand
• Cleaning Demand
• Cooling Demand
• Emergency Demand
• Future Expansion
• Storage Refill

A Process Requiring 30 m³/h Continuously Needs A Different Pump System From A Process Requiring 60 m³/h For Ten Minutes Each Hour.

A Buffer Tank May Allow A Smaller Well Pump To Refill Water Between Peak-demand events.

What Is Well Yield?

Well Yield Is The Flow A Well Can Produce Under Defined Pumping Conditions.

It Is Commonly Measured During A Pumping Test.

Important Test Data Includes:

• Static Water Level
• Pumping Rate
• Pumping Water Level
• Drawdown
• Test Duration
• Recovery Rate
• Sand Production
• Water Quality

A Short Test May Not Reveal Seasonal Or Long-Term Water-Level Changes.

Should Pump Flow Exceed Well Yield?

The Pump’s Continuous Flow Should Not Normally Exceed The Well’s Sustainable Yield.

If Pump Flow Exceeds Inflow:

• Water Level Falls
• Pump Intake May Become Exposed
• Motor Cooling May Decrease
• Sand Production May Increase
• Dry-Run Protection May Trip
• Well Performance May Decline

A Pump Can Have A Maximum Capacity Higher Than Well Yield, But The Control System Must Prevent Unsustainable Operation.

Possible Solutions Include:

• Flow-Control Valve
• VFD Speed Limiting
• Water-Level Sensors
• Dry-Run Protection
• Storage Tank
• Timed Pumping
• Lower-Flow Pump

What Is Specific Capacity?

Specific Capacity Describes Well Performance.

Use:

Specific Capacity = Pumping Rate ÷ Drawdown

For Example:

• Pumping Rate: 20 m³/h
• Drawdown: 10 Meters

Specific Capacity = 2 m³/h Per Meter Of Drawdown

Specific Capacity Can Help Compare Well Performance Over Time.

A Declining Value May Indicate:

• Well Clogging
• Screen Blockage
• Aquifer Changes
• Excessive Pumping
• Mineral Deposits
• Sand Accumulation

Specific Capacity Is Not A Complete Substitute For Professional Aquifer Analysis.

Peak Demand Vs. Average Demand

Peak Demand Is The Highest Short-Term Flow Required By The System.

Average Demand Is The Total Volume Divided By Time.

A System May Have:

• Low Average Demand
• High Short-Term Peak Demand
• Limited Well Yield

In This Situation, Installing A Large Pump May Overpump The Well.

A Better Solution May Use:

1. A Lower-Flow Well Pump.
2. A Large Storage Tank.
3. A Separate Booster Pump.
4. A Pressure-Control System.

The Well Pump Fills Storage Over Time, While The Booster Pump Meets Peak Demand.

How Storage Changes Pump Flow Selection

Storage Separates Source Capacity From Peak User Demand.

For Example:

• Well Yield: 5 GPM
• Peak Building Demand: 15 GPM
• Daily Demand: Within Well Capacity

A 15 GPM Well Pump Could Overpump The Source.

Instead, A 5 GPM Pump Can Fill A Storage Tank. A Booster System Then Supplies The 15 GPM peak.

Storage Design Should Consider:

• Daily Water Volume
• Peak Demand Duration
• Refill Time
• Emergency Reserve
• Water Quality
• Tank Turnover
• Pump Cycling
• Control Method

How To Read Flow On A Pump Curve

A Pump Curve Shows:

• Flow On The Horizontal Axis
• Head On The Vertical Axis
• Efficiency
• Motor Power
• Number Of Stages
• Recommended Operating Range

To Select A Pump:

1. Determine Required Flow.
2. Calculate Total Dynamic Head.
3. Locate Flow On The Horizontal Axis.
4. Locate Head On The Vertical Axis.
5. Find Their Intersection.
6. Compare The Point With The Pump Curve.
7. Confirm Efficiency And Motor Power.
8. Check The Recommended Operating Range.

A Deep Well Submersible Pump Buyer Guide Provides Additional Curve-Selection Information.

Why Pump Model Names Can Be Misleading

A Pump Model May Include A Nominal Flow Value.

For Example, A Pump Labeled 10 GPM May Have:

• Minimum Recommended Flow Below 10 GPM
• Rated Flow Near 10 GPM
• Maximum Permitted Flow Above 10 GPM

Franklin Electric’s Published 10 GPM Submersible Pump Data Shows Separate Rated, Minimum, And Maximum Flow Values.

Always Use The Complete Performance Curve And Technical Data.

What Is The Best Efficiency Point?

The Best Efficiency Point, Or BEP, Is The Point Where A Centrifugal Pump Reaches Its Highest Hydraulic Efficiency.

Operating Near BEP Can Reduce:

• Energy Consumption
• Hydraulic Vibration
• Internal Recirculation
• Bearing Load
• Shaft Deflection
• Component Wear

The Recommended Operating Range Usually Extends On Both Sides Of BEP.

Do Not Assume The Pump Must Operate Exactly At BEP Under Every Condition. However, Avoid Continuous Operation At Extreme Low Or High Flow.

What Happens If Pump Flow Is Too High?

Excessive Pump Flow Can Cause:

• Rapid Well Drawdown
• Dry Running
• Sand Production
• Motor Overload
• Upthrust
• Low Discharge Pressure
• High Pipe Velocity
• Excessive Friction Loss
• Water Hammer
• Check-Valve Stress
• Poor Pump Efficiency

A High Flow Deep Well Pump Requires Accurate Well And Pipeline Data.

What Happens If Pump Flow Is Too Low?

Insufficient Flow Can Cause:

• Poor Water Pressure
• Slow Tank Filling
• Inadequate Irrigation
• Process Interruption
• Long Motor Run Time
• Failure To Meet Peak Demand

Operating A Pump Far Below Its Recommended Flow Can Also Cause:

• Internal Recirculation
• Water Heating
• Vibration
• Radial Load
• Thrust Problems
• Reduced Efficiency

How Pipe Diameter Affects Flow

A Small Pipe Increases Flow Velocity And Friction.

This Raises Total Dynamic Head And Reduces Actual Pump Flow.

An Oversized Pipe Costs More But Reduces Friction.

Pipe Selection Should Consider:

• Design Flow
• Pipe Length
• Internal Diameter
• Pipe Material
• Pressure Rating
• Water-Hammer Risk
• Installation Cost
• Future Demand

Use Actual Internal Diameter When Calculating Friction.

How Pipe Length Affects Flow

Longer Pipe Creates More Friction Loss.

The System May include:

• Vertical Drop Pipe
• Underground Discharge Pipe
• Building Pipework
• Irrigation Mainline
• Branch Pipelines

Include The Complete Water Path, Not Only The Well Depth.

How Check Valves Affect Flow

Every Check Valve Adds Resistance.

The Loss Depends On:

• Valve Type
• Valve Size
• Flow Rate
• Opening Position
• Spring Force
• Installation Orientation

An Undersized Or Partially Open Valve Can Reduce Flow And Increase Energy Consumption.

How Filters Affect Flow

A Clean Filter Produces A Certain Pressure Drop.

As It Collects Sand Or Sediment, Resistance Increases And Flow Falls.

Select The Pump For Both Normal And Maximum Permitted Filter Pressure Drop.

Water With Abrasive Particles May Require A Sand Resistant Submersible Pump And Proper Well Development.

How A VFD Changes Pump Flow

A VFD Changes Motor Speed By Changing Output Frequency.

According To The Affinity Laws:

• Flow Changes Approximately In Proportion To Speed
• Head Changes Approximately With Speed Squared
• Power Changes Approximately With Speed Cubed

A VFD Can:

• Maintain Constant Pressure
• Match Variable Demand
• Reduce Starting Current
• Limit Maximum Well Flow
• Reduce Cycling
• Improve Process Control

However, A VFD Cannot Increase The Sustainable Yield Of The Well.

Do Not Increase Frequency Above The Pump And Motor Manufacturer’s Approved Limits.

How Pressure Tanks Affect Flow

A Pressure Tank Does Not Increase The Pump’s Continuous Flow Capacity.

It Stores A Limited Amount Of Water Between Pump Cycles.

A Larger Tank Can:

• Reduce Pump Starts
• Increase Drawdown
• Support Small Short-Term Demands
• Stabilize Pressure

However, It Cannot Sustain A High Flow After Its Stored Water Is Used.

How To Measure Submersible Pump Flow Rate

Volumetric Test

Direct Water Into A Container With Known Volume.

Use:

Flow Rate = Collected Volume ÷ Collection Time

For Example:

• Collected Water: 200 Liters
• Collection Time: 40 Seconds

200 ÷ 40 = 5 Liters Per Second

Convert To Cubic Meters Per Hour:

5 L/s × 3.6 = 18 m³/h

Water Meter

Record The Meter Before And After A Timed Test.

Divide The Volume Difference By The Test Time.

Inline Flow Meter

Possible Flow-Meter Types Include:

• Turbine Meter
• Magnetic Flow Meter
• Ultrasonic Flow Meter
• Paddlewheel Meter
• Differential-Pressure Meter

The Meter Must Match Pipe Size, Flow Range, Water Quality, And Accuracy Requirements.

Tank-Fill Test

Measure Tank Volume And Fill Time.

This Method Requires A Known Tank Volume And Controlled Inlet And Outlet Conditions.

Why Flow Measurements Can Be Incorrect

Common Measurement Errors Include:

• Inaccurate Container Volume
• Incorrect Timing
• Air In The Pipeline
• Changing Water Level
• Unstable Pressure
• Meter Installed Incorrectly
• Insufficient Straight Pipe
• Partially Closed Valve
• Leaking Bypass
• Simultaneous Water Use

Repeat The Test Several Times Under Stable Conditions.

How To Diagnose Low Pump Flow

Possible Causes Include:

• Falling Water Level
• Excessive TDH
• Worn Impellers
• Blocked Intake Screen
• Sand Accumulation
• Damaged Diffusers
• Low Voltage
• Incorrect Motor Rotation
• Reduced VFD Frequency
• Undersized Pipe
• Blocked Filter
• Partially Closed Valve
• Leaking Drop Pipe
• Worn Pump Stages

Measure Flow, Pressure, Water Level, Voltage, Current, And Frequency Before Removing The Pump.

How To Diagnose Excessive Pump Flow

Possible Causes Include:

• Lower Actual Head
• Incorrect Pump Selection
• Excessive VFD Frequency
• Discharge Valve Open Too Far
• Oversized Pipework
• Incorrect Pump Curve
• Missing System Resistance

Excessive Flow Can Overload The Motor And Overpump The Well.

Check Motor Current And Pumping Water Level.

Flow Selection For Constant-Pressure Systems

A Constant-Pressure System Changes Pump Speed To Match Demand.

Select The Pump So That It Can:

• Meet Maximum Flow At Required Pressure
• Operate Safely At Minimum Speed
• Maintain Motor Cooling
• Avoid Excessive Maximum Frequency
• Enter Sleep Mode At Very Low Demand
• Remain Within The Pump Curve

A VFD Should Not compensate for incorrect pump sizing.

Flow Selection For Solar Pump Systems

Solar Pump Flow Changes With Available Solar Power.

Calculate:

• Required Daily Water Volume
• Total Dynamic Head
• Solar Operating Hours
• Seasonal Irradiance
• Storage Capacity
• Pump Efficiency
• Controller Efficiency
• Array Capacity

Solar Systems Often Store Water Instead Of Electrical Energy.

The Pump May Produce Higher Flow At Midday And Lower Flow During Morning Or Evening.

Flow Selection For Multiple-Pump Systems

Multiple Pumps Can Provide Flexible Capacity.

A Controller Can:

• Start One Pump At Low Demand
• Add Pumps As Demand Increases
• Alternate Lead Pumps
• Maintain Constant Pressure
• Provide Backup Capacity
• Reduce Low-Flow Operation

Parallel Pumps Increase Flow, But The Actual Combined Flow Depends On The System Curve.

Common Flow-Selection Mistakes

Selecting Only By Horsepower

Motor Power Does Not Determine Flow By Itself.

Different Pumps With The Same Motor Power Can Produce Different Flow And Head.

Selecting Only By Maximum Flow

Maximum Flow Usually Occurs At Low Head.

Use The Required Flow At Actual TDH.

Ignoring Well Yield

A High-Capacity Pump Can Overpump A Low-Yield Well.

Adding Every Fixture Flow

This Can Produce An Unrealistically High Residential Peak demand.

Use An Approved Diversity Method.

Ignoring Pumping Hours

Daily Volume And Available Pumping Time Determine Required Average Flow.

Ignoring Pipe Friction

Pipe Resistance Can Reduce Actual Flow Significantly.

Ignoring Minimum Flow

A Pump Must Not Operate Continuously Below Its Approved Range.

Adding Excessive Safety Margin

Oversizing Creates Hydraulic And Electrical Problems.

Use Accurate Data And A Reasonable Design Allowance.

Information Required For Flow Selection

Provide The Following Information To The Pump Manufacturer:

• Required Peak Flow
• Required Daily Volume
• Available Pumping Hours
• Static Water Level
• Pumping Water Level
• Well Yield
• Well Diameter
• Total Dynamic Head
• Delivery Pressure
• Pipe Diameter
• Pipe Length
• Pipe Material
• Water Temperature
• Sand Content
• Storage-Tank Capacity
• Supply Voltage
• Number Of Phases
• Control Method
• Daily Operating Hours
• Future Expansion

Complete Data Helps The Manufacturer Select The Pump, Motor, Stages, Cable, Pipe, And Controller.

Frequently Asked Questions

What Is A Good Flow Rate For A Submersible Well Pump?

The Correct Flow Depends On Water Demand, Well Yield, Total Dynamic Head, And Storage. There Is No Universal Flow Rate For Every Well.

Is Pump Flow The Same At Every Depth?

No. Greater Pumping Lift Usually Increases TDH And Reduces Flow.

Can A 10 GPM Pump Produce More Than 10 GPM?

Possibly. The Model May Have A Nominal 10 GPM Rating But A Wider Operating Range. Check The Manufacturer’s Curve.

Should Pump Flow Equal Well Yield?

Continuous Pump Flow Should Generally Remain Within The Well’s Sustainable Yield. Storage Can Help Meet Short-Term Demand Above The Well Yield.

Can A Bigger Pump Improve Water Pressure?

Only If It Matches The System Head And Flow Requirements. An Oversized Pump Can Cause High Flow, Overload, Cycling, And Well Drawdown.

Does A Pressure Tank Increase Pump Flow?

No. It Provides A Limited Stored Volume Between Pump Cycles. It Does Not Increase Continuous Pump Capacity.

Can A VFD Increase Pump Flow?

A VFD Can Increase Speed Within Approved Limits. It Cannot Increase Well Yield Or Safely Exceed Pump And Motor Ratings.

Why Is My Pump Flow Lower Than The Catalog Rating?

Actual TDH May Be Higher Than Expected. Other Causes Include Low Voltage, Worn Impellers, Blocked Filters, Low Speed, Or A Falling Water Level.

How Can I Measure Pump Flow?

Use A Timed Container Test, Water Meter, Tank-Fill Test, Or Correctly Installed Flow Meter.

Should I Select Flow Before Head?

Determine Required Flow And TDH Together. The Pump Must Meet Both Values At One Operating Point.

Choose The Correct Submersible Pump Flow From Liyuan

Liyuan Manufactures Submersible Water Pumps, Deep Well Motors, Solar Pump Systems, And Control Solutions.

Liyuan Can Select A Pump According To:

• Required Flow
• Total Dynamic Head
• Well Yield
• Well Diameter
• Water Quality
• Motor Voltage
• Pipe Size
• Control Method
• Application Requirements

Providing Complete Hydraulic Data Helps Liyuan Match The Pump, Motor, Stages, Cable, And Controller Correctly.

Conclusion

The Correct Submersible Pump Flow Rate Must Meet Water Demand While Remaining Within The Well’s Sustainable Yield And The Pump’s Recommended Operating Range.

Determine Peak Demand, Daily Volume, Available Pumping Hours, Storage Capacity, And Well Yield.

Then Calculate Total Dynamic Head And Select The Pump From Its Complete Performance Curve.

Do Not Select A Pump Using Only Horsepower, Model Name, Maximum Flow, Or Well Depth.

Accurate Flow Selection Improves Pressure, Energy Efficiency, Motor Reliability, Well Performance, And The Service Life Of The Complete Water System.