Centrifugal Pump vs Submersible Pump: Which One Actually Fits Your Property?

Choosing between centrifugal pumps and submersible pumps is not about which pump is “better.” That is lazy thinking. The real question is: which pump fits your water source, pressure demand, flow rate, pipe distance, elevation and installation setup?

A centrifugal water pump is usually installed above ground and is commonly used for tank transfer, irrigation, garden watering, pressure support and general water movement. A submersible pump is designed to operate underwater, making it better for bores, wells, pits, sumps, drainage and groundwater supply.

For Australian homes, farms and businesses, this decision matters. Choose wrong and you may end up with weak pressure, poor flow, overheating, cavitation or a pump that fails earlier than it should.

Pumptastic offers water pumps online in Australia for residential, commercial and agricultural needs, including pressure pumps, submersible pumps, irrigation pumps and pool pumps from major brands. The site also promotes fast Australia-wide dispatch and free shipping on orders over $100.

Not sure which pump suits your property? Shop water pumps online at Pumptastic or contact the team before you order.

Centrifugal Pump vs Submersible Pump:

Here is the simple version.

A centrifugal pump pulls water into the pump and pushes it through the discharge line using a spinning impeller. A submersible pump sits inside the water and pushes water upward or outward from the source.

If your pump will sit near a tank, shed, dam, irrigation setup or pump station, centrifugal pumps may be the right direction. If your pump needs to sit underwater, a submersible pump is usually the better fit.

What Is a Centrifugal Water Pump Best For?

A centrifugal water pump is best when you need to move clean or relatively clear water from one place to another.

Common uses include:

Centrifugal pumps are commonly selected based on the required flow rate and total head. NSW DPI explains that pump duty is the basis of pump selection and is expressed through flow rate/discharge and total head/pressure required.

That means you should not buy based on motor size alone. A bigger motor does not automatically mean the pump will suit your system.

If you do not know your flow rate or total head, read the guide: Single Stage vs Multistage Pump: Which Gives Better Water Pressure?

What Is a Submersible Pump Best For?

A submersible pump is best when the pump must operate underwater.

It is commonly used for:

The biggest advantage is that a submersible pump does not need to pull water from above ground in the same way a surface pump does. Because it is already submerged, it can push water from the source more effectively in bore, pit or drainage situations.

But do not assume every submersible pump suits every job. Bore depth, water quality, pressure demand, cable length, control system and pipe size still matter.

Flow Rate, Head and PSI: What You Must Check First

Before choosing between centrifugal pumps and submersible pumps, check these three numbers.

Simple head-to-PSI guide:

This is where many buyers get caught. A pump may show a strong maximum flow rate, but that number usually drops once real-world head, pipe length, elbows, valves and pressure demand are added.

Do not guess the specs. Contact Pumptastic before buying if you are unsure about flow rate, head or PSI.

Centrifugal Pump vs Submersible Pump Comparison Table

The clean decision is this:

Choose a centrifugal water pump when the water source is accessible and the pump can sit above ground.

Choose a submersible pump when the pump must sit inside the water source.

When a Multistage Pump Is the Smarter Choice

If your real problem is weak pressure, neither a basic centrifugal pump nor a basic submersible pump may be enough.

This is where a multistage pump matters.

A multistage pump uses multiple impeller stages to generate higher head and stronger pressure. Grundfos describes inline multistage pumps as pumps used where high head is needed, with several impeller stages connected in series.

A multistage pump may be better for:

• High-pressure water systems
• Long pipe runs
• Multi-level buildings
• Commercial pressure boosting
• Irrigation zones needing stronger pressure
• Water treatment systems
• Higher-demand agricultural systems

Pumptastic’s Grundfos multistage pump range includes options designed for homeowners, gardeners and builders who need dependable water pressure.

Example product comparison:

Pumptastic lists the Grundfos CR 3-11 as suitable for pressure boosting, water treatment, irrigation and solar water supply, while the Grundfos CR 3-15 is described as a vertical non-self-priming multistage inline centrifugal pump for industrial, commercial and agricultural applications.

If pressure is your main issue, read the guide: Need a High-Pressure Water System? Why a Multistage Pump Is Usually the Better Investment.

Best Pump Choice by Property Type

The point is simple: match the pump to the property. Do not buy based on one keyword, one brand or one cheap price.

Common Buying Mistakes to Avoid

Mistake 1: Buying the Cheapest Pump

Cheap pumps become expensive when they do not meet pressure demand or fail early.

Mistake 2: Ignoring Head and PSI

Flow rate alone is not enough. A pump must handle the pressure and resistance in your actual system.

Mistake 3: Using a Surface Pump for Deep Water

Deep bore or well applications usually need a submersible pump, not a basic surface centrifugal pump.

Mistake 4: Ignoring Multistage Pumps

If you need stronger pressure, a multistage pump may be the better investment.

Mistake 5: Choosing by Brand Alone

A Grundfos centrifugal pump can be a strong option, but only if the exact model matches your required flow, head and application.

Ready to Choose the Right Pump?

Centrifugal pumps and submersible pumps both have a place.

Choose a centrifugal water pump for above-ground water transfer, tanks, garden watering, farm water movement and suitable irrigation systems.

Choose a submersible pump for bores, wells, pits, sumps and submerged water sources.

Choose a multistage pump when pressure is the real issue.

Ready to stop guessing? Shop centrifugal pumps, submersible pumps, multistage pumps and Grundfos centrifugal pump options online at Pumptastic, or contact the team for help choosing the right pump before you order.

FAQs

1. What is the difference between a centrifugal pump and a submersible pump?

A centrifugal pump is usually installed above ground and moves water using an impeller. A submersible pump operates underwater and pushes water from inside the water source.

2. Is a centrifugal water pump good for irrigation?

Yes, a centrifugal water pump can suit irrigation if the flow rate, head and PSI match the sprinkler zones and pipe layout.

3. When should I use a submersible pump?

Use a submersible pump for bores, wells, pits, sumps, drainage and groundwater applications where the pump must operate underwater.

4. Is a multistage pump better than a normal centrifugal pump?

A multistage pump is better when the system needs higher pressure or higher head. For simple transfer, a standard centrifugal pump may be enough.

5. Is a Grundfos centrifugal pump worth buying?

A Grundfos centrifugal pump can be worth considering for pressure boosting, irrigation, water treatment and commercial applications, but the model must match your system.