4 inch submersible borehole pumps fit any borehole with 100mm (4″) casing or wider, which covers most domestic, garden, livestock and smallholding boreholes in South Africa. We stock the stainless-steel Vega 4SD and 4ST ranges from 0.25kW to 7.5kW, as complete pump-and-motor sets from R5,890, with 220V single-phase and 380V three-phase motors. Every set can be paired with a control box, pressure switch and pressure tank to make a full borehole-to-house system.
How to read the model numbers and pick a size
A 4SD pump name tells you two things: 4SD6/7 means a nominal flow of 6 m³/h (6,000 litres an hour) with 7 impeller stages. More stages means more head: the 4SD6/5 lifts 36 m and the 4SD6/7 lifts 50 m at the same flow. Choose the flow first, then the number of stages that gives you the head you need.Flow: stay below the borehole yield from the driller’s test. 2–3 m³/h pumps suit most homes; 4–8 m³/h for irrigation and livestock; 10 m³/h and up for farms.Head: pumping water level + height to the tank + friction + any pressure you want at the tap. Pick the pump whose curve delivers your flow at that head, not the one whose “max head” merely exceeds it.Power: 0.25–1.1kW on 220V single-phase for homes; 1.5kW and up usually on 380V three-phase. Single-phase motors need a control box with a start capacitor.Cable and pipe: use our cable sizing chart for the drop cable, 32mm or 40mm HDPE rising main for most 4″ pumps, and a stainless safety rope.Fit a non-return valve above the pump, dry-run protection such as a Motorscope or a float in the borehole, and install the pump at least 3 m above the bottom of the hole and below the pumping water level.
4″ borehole pump FAQ
How deep can a 4 inch borehole pump go?The 4SD range covers heads from about 30 m to well over 200 m depending on the model, so most domestic and farm boreholes are covered. Tell us the depth and we will match the stages.What is the difference between 4SD and 4ST?Both are stainless-steel Vega 4″ pumps with a different flow and stage line-up, and both fit standard 4″ NEMA motors. Tell us your yield and head and we will pick the one whose curve fits best.Can I buy just the pump end if my motor is fine?Yes. 4″ pump ends and motors use the standard NEMA coupling, so you can replace one without the other. See our borehole motors category.Do you deliver nationwide?Yes. Complete 4″ sets are couriered across South Africa. For sizing, send your driller’s report to WhatsApp 061 744 1001.
Not sure which pump you need? Read our borehole pump size guide.
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Price range: R1,490.00 through R7,450.00
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Price range: R2,030.00 through R20,110.00
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Price range: R2,230.00 through R22,990.00
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Price range: R2,310.00 through R23,060.00
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Price range: R2,830.00 through R27,480.00
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Price range: R3,220.00 through R34,100.00
This product has multiple variants. The options may be chosen on the product page 4SD or 4ST?
The 4SD range covers most household and farm boreholes, from a single home up to irrigation. The 4ST range is built for low flow at very high head, for deep boreholes with a low yield. In a model name such as 4SD16/18, the number before the slash is the pump's nominal flow in m³/h and the number after it is the number of stages: more stages give more head.
The "max head" in the name is at zero flow. At your working flow the pump delivers less, so choose one with a max head about 20–30% above your total lift (the water level while pumping, plus the height to your tank, plus pipe friction).
Single-phase, three-phase or solar?
Most homes use a 220V single-phase pump with a control box. Three-phase motors can run from a VSD, which gives soft starting and constant pressure and can protect the pump against dry running. For off-grid homes, see our solar borehole pumps, and for replacement motors see borehole motors.
WhatsApp your borehole depth, water level and yield to 061 744 1001 and we'll recommend a pump. Delivered nationwide.