Choosing the right borehole pump is one of the most important decisions you can make for your household or farming operation. An undersized pump will leave you with low pressure and frustration, while an oversized pump can waste energy, damage your borehole, and cost more than necessary. At Pumps Africa & Tools, we specialize in helping South Africans find the correct pump size, whether it’s for daily household use, irrigation, or commercial farming.
Step 1: Know Your Water Demand
Start by estimating how much water you need:
- Household use: On average, a family of four requires 20–30 litres per minute for taps, showers, and appliances.
- Small farms: Irrigation systems may demand anything from 60–150 litres per minute, depending on the crop and sprinkler layout.
- Large farms: High-volume irrigation such as centre pivots can exceed 500 litres per minute.
Tip: List all water points (taps, sprinklers, drippers, tanks) that may run at the same time. This will give you the required flow rate (litres per minute or m³/h).
Step 2: Calculate the Total Head (Pressure Requirement)
The total head is the “height” your pump must overcome. This includes:
- Static water level – depth of water in your borehole (e.g., 40 m).
- Drawdown – how much the water level drops during pumping.
- Delivery height – how high the water must be lifted to the tank or highest tap.
- Friction losses – resistance in pipes, bends, and valves.
For example:
- Borehole water depth: 40 m
- Drawdown: 5 m
- Tank height: 10 m
- Friction losses: 5 m
Total head = 60 m
Step 3: Match the Borehole Pump Curve to Your Needs
Leading brands like Algo Pumps, Grundfos, KSB, and Ebara provide detailed pump curves that show flow vs. head. By plotting your flow rate and total head, you can select the pump that delivers the right pressure without overloading.
At Pumps Africa & Tools, we stock:
- Algo X-Ora borehole pumps – affordable and reliable for domestic use.
- Grundfos SQFlex solar pumps – perfect for off-grid farms.
- KSB borehole pumps – durable for industrial and farming operations.
- Ebara submersibles – stainless steel options for harsh water conditions.
Step 4: Consider Power Supply for Borehole Pump
- Single-phase 220V: Ideal for households and light farm use.
- Three-phase 380V: Suitable for larger farms and higher kW pumps.
- Solar-powered options: Growing in popularity for reducing energy costs in rural areas.
Borehole Pump Sizing Comparison Chart
Below is a general guideline comparing common borehole pump sizes, flow rates, pressure (head), and typical applications. Exact performance will vary between brands (e.g., Algo Pumps, Grundfos, KSB, Ebara), but this table gives a reliable starting point.
| Pump Motor Size (kW) | Typical Flow Rate (Litres/Minute) | Typical Total Head (Metres) | Number of Sprinklers Supported* | Common Applications | Recommended Brands |
|---|---|---|---|---|---|
| 0.37 kW (0.5 HP) | 20–25 L/min | 30–40 m | 2–3 sprinklers | Small household supply, filling tanks, low water demand | Algo Lavo, Grundfos SQ |
| 0.75 kW (1.0 HP) | 35–45 L/min | 40–60 m | 4–6 sprinklers | Medium household, garden irrigation | Algo X-Ora, Grundfos SQFlex, Ebara Best One |
| 1.1 kW (1.5 HP) | 50–60 L/min | 50–70 m | 6–10 sprinklers | Larger homes, small farms, multiple taps | Algo X-Ora, KSB Borehole, Grundfos SP |
| 1.5 kW (2.0 HP) | 70–90 L/min | 60–80 m | 10–15 sprinklers | Small-scale farming, medium irrigation systems | Algo X-Ora, Ebara Stainless Steel, Grundfos SP |
| 2.2 kW (3.0 HP) | 100–120 L/min | 70–90 m | 15–20 sprinklers | Larger farms, tank filling, centre pivots (small) | KSB, Grundfos SP, Ebara EVMS |
| 3.0 kW (4.0 HP) | 120–150 L/min | 80–100 m | 20–30 sprinklers | Commercial farms, industrial use, multiple irrigation zones | Grundfos SP, KSB Borehole, Algo Industrial |
| 5.5 kW (7.5 HP) | 180–250 L/min | 100–120 m | 30+ sprinklers or pivots | Large farms, commercial irrigation, high-demand systems | KSB, Grundfos SP, Ebara EVMS |
*Based on average 3–4 bar sprinkler requirements (Hunter / Rain Bird pop-ups).
How to Use This Char
Insight
For a family home with a borehole around 50 metres deep, a 0.75 kW Algo X-Ora or Grundfos SQFlex is usually more than enough to run taps, showers, and a few sprinklers. But for a farmer irrigating a 2-hectare plot, a 2.2 kW or larger pump from KSB or Ebara will deliver the flow needed to keep crops healthy.
The wrong pump can waste money and water; the right pump brings peace of mind and long-term reliability. That’s where Pumps Africa & Tools comes in—we make sure your borehole pump is perfectly matched to your needs.
Why Borehole Pump Sizing Matters
Imagine investing in a borehole only to find that your sprinklers sputter or your shower runs dry when the washing machine is on. Correct sizing avoids this frustration and ensures peace of mind. Farmers especially benefit, as a well-sized pump keeps irrigation consistent and protects crops.
Final Word
Sizing a borehole pump is not guesswork—it’s a balance between flow, head, and efficiency. With the right advice, you can enjoy reliable water for years.
At Pumps Africa & Tools, we don’t just sell pumps—we guide you through the selection process with expert advice, pump curves, and trusted brands like Algo, Grundfos, KSB, and Ebara.
💧 Need help sizing your borehole pump? Contact our team today and we’ll make sure you get the perfect fit for your household or farm.