Leo 4SR16-20 / 5.5KW Submersible Borehole Pump Only
10483
The LEO 4SR16-20 is a 4-inch (100 mm) stainless steel submersible borehole pump end from the 4SR16 series, built for high-volume water supply from boreholes of 100 mm (4") diameter and larger. With 20 stages and a 5.5 kW (7.5 HP) motor rating, it delivers a nominal 16 m³/h, handles up to 24 m³/h (400 l/min), and produces up to 125 m of head at shut-off (about 89 m at 12 m³/h). This is the pump end only: it couples to a standard 4" NEMA submersible motor of 5.5 kW, sold separately.
The 4SR range uses an AISI304 stainless steel outer casing, shaft and motor bracket, with floating Noryl® impellers (FDA-approved material) that tolerate small amounts of sand. A built-in AISI304 check valve and inlet strainer protect the pump and the rising main. Typical uses are farm and game-farm water supply, irrigation, livestock watering, domestic and estate borehole systems, and pressure boosting when paired with a suitable tank or controller.
At a glance
Power: 5.5 kW (7.5 HP)Max. head: 125 mMax. flow: 23.8 m³/h (397 l/min)Connections: Outlet 2"Best for: Borehole water supply for farms, estates and homes, Irrigation and livestock watering, Mining and building-site dewatering from boreholesSpecifications
| Brand | Leo |
| Model | 4SR16-20 (pump end only) |
| Stages | 20 |
| Motor required | 5.5 kW / 7.5 HP, 4" NEMA submersible motor (3-phase 380-415V; single-phase available up to 2.2 kW) |
| Nominal flow | 16 m³/h; operating range 8.4 - 24 m³/h |
| Maximum head | 125 m |
| Borehole | minimum 100 mm (4") internal diameter |
| Materials | AISI304 casing, shaft, bracket and check valve; Noryl® floating impellers |
| Maximum fluid temperature | 35 °C |
| Maximum sand content | 0.25% |
| Frequency | 50 Hz |
| Brand | Leo |
| Model | 4SR16-20 |
| Type | 4SR16 Submersible Borehole Pump (100 mm) |
| Motor power | 5.5 kW (7.5 HP) |
| Stages | 20 |
| Connection | Outlet 2" |
| Shut-off head | 125 m |
| Flow range | 0 – 23.8 m³/h (0 – 397 l/min) |
| Dimensions (W × L × H) | 10 × 150 × 10 cm |
| Weight | 13.5 kg |
| Item code | 4SR16-20 |
Performance Table
| Flow Q (m³/h) | 0 | 2.4 | 4.8 | 7.2 | 9.6 | 12 | 14.4 | 16.8 | 19.2 | 21.6 | 23.8 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Flow Q (l/min) | 0 | 40 | 80 | 120 | 160 | 200 | 240 | 280 | 320 | 360 | 397 |
| Head H (m) | 125 | 123 | 119 | 114 | 107 | 98.9 | 89.1 | 77.7 | 65 | 51.3 | 38.3 |
Head at each flow rate from the manufacturer's technical data. For a duty-point check use the Get a Quote wizard below.
Performance Curves and Technical Data (PDF)
Download the curve sheet with the performance curves, dimensions and technical data for the Leo 4SR16-20:
Leo 4SR16 Series Performance Curves
441 kB | Download
Applications
- Borehole water supply for farms, estates and homes
- Irrigation and livestock watering
- Mining and building-site dewatering from boreholes
- Water transfer to reservoirs and elevated tanks
Need help choosing or want a price?
Our pump team will check the right size for your flow and head and give you a quote.
WhatsApp us: 082 516 2248 Get a Quote / Size my pump info@pumps.co.za
Frequently Asked Questions
What is the maximum head of the Leo 4SR16-20?
The Leo 4SR16-20 has a maximum head of 125 m.
How much water can the Leo 4SR16-20 pump?
The Leo 4SR16-20 pumps up to 23.8 m³/h (397 l/min).
What is the motor power of the Leo 4SR16-20?
The motor power is 5.5 kW (7.5 HP).
What are the pipe connections of the Leo 4SR16-20?
Outlet 2".
