3kW 10.8m³/h 125m Doyin 4SP8-21 4HP Stainless Steel Impeller 3-Phase Borehole Submersible Water AC Pump

The 4.0HP Doyin 4SP8-21 Stainless Steel Borehole Pump Body is designed for borehole installations requiring a strong combination of high water volume and substantial lifting head. Designed for pairing with a 4.0HP submersible motor, it delivers up to 10.8m³/h (10,800 litres per hour) with a maximum head of approximately 125 metres.

Its multistage hydraulic configuration develops the pressure needed to lift groundwater while maintaining substantial water delivery. The 10,800L/h maximum flow makes this model particularly useful for farms, estates, institutions and commercial properties with higher daily water requirements.

The stainless-steel construction provides durability and corrosion resistance for submerged borehole operation. Macire supplies verified Doyin pumping products and provides technical guidance on motor matching, borehole sizing, controls and installation requirements.

⭐ Genuine Product | Verified & Supported by Macire

System Architecture & Configuration

Multistage Hydraulic System

The 4SP8-21 uses a multistage hydraulic configuration designed to develop the pressure required for high-flow, high-head borehole pumping.

High-Volume Water Delivery

Provides maximum water delivery of approximately 10.8m³/h, equivalent to 10,800 litres per hour.

125m Head Capability

The 125m maximum head provides substantial lifting capability for deep boreholes and elevated water-storage systems.

Stainless Steel Construction

Stainless steel construction provides strength and corrosion resistance for prolonged submerged operation.

Motor Configuration

Designed for pairing with a compatible 4.0HP submersible borehole motor.

Technical Specifications

Key Features

• High 10.8m³/h maximum flow capacity.
• Delivers up to approximately 10,800 litres per hour.
• 125m maximum head for demanding borehole installations.
• Designed for pairing with a 4.0HP submersible motor.
• Multistage hydraulic configuration for efficient pressure development.
• Stainless steel construction for submerged operation.
• Suitable for rapid filling of larger water-storage tanks.
• Strong combination of high flow and substantial lifting head.
• Suitable for agricultural, institutional and commercial water systems.
• Compatible with suitable controllers, water-level sensors and protection systems.
• Technical sizing and motor-matching support available through Macire.

Applications / Use Cases

• 🚜 Farms – High-volume borehole water supply for livestock, irrigation storage and farm operations.
• 🏠 Homes & Estates – Supplying larger elevated storage tanks from boreholes.
• 🏢 Commercial Properties – Groundwater supply for facilities with substantial daily demand.
• 🏥 Institutions – Borehole water supply for schools, hospitals and similar facilities.
• 🏭 Light Commercial Use – High-volume groundwater transfer and storage.

Installation & Engineering Notes

Correct selection of the Doyin 4SP8-21 should consider the borehole’s dynamic water level, sustainable yield, required flow, delivery elevation, pipe friction losses and total dynamic head.

The pump body should be paired with a compatible 4.0HP submersible motor. Use correctly sized delivery pipes, electrical cables, non-return valves and control equipment.

Because the pump can deliver up to 10,800L/h, the borehole’s sustainable yield should be confirmed to minimise excessive drawdown and dry-running risk. Macire can provide technical guidance on appropriate system configuration.

Care, Maintenance & Operations

1. Monitor water flow and pressure regularly.
2. Ensure the borehole can sustain the required pumping rate.
3. Install appropriate dry-run protection.
4. Maintain suitable motor-overload protection.
5. Inspect electrical connections and control equipment periodically.
6. Check delivery pipes and valves for leaks or restrictions.
7. Investigate significant reductions in flow or pressure.
8. Use compatible replacement components during servicing.

Do’s & Don’ts

Do’s

• Confirm the borehole’s sustainable water yield.
• Calculate the required total dynamic head.
• Match the pump body with a compatible 4.0HP motor.
• Install dry-run and overload protection.
• Correctly size delivery pipes and electrical cables.
• Use a competent borehole technician for installation.

Don’ts

• Do not operate if the borehole cannot sustain the required flow.
• Do not interpret the 125m maximum head as borehole depth alone.
• Do not use an incorrectly rated motor.
• Do not operate against a closed or blocked discharge.
• Do not install without suitable electrical protection.
• Do not ignore abnormal reductions in water delivery.

Compatibility

Compatible with appropriately selected:

• 4.0HP submersible borehole motors
• Doyin automatic pump controllers
• Doyin stainless steel water-level sensors
• Dry-run protection systems
• Borehole control panels
• Motor protection equipment
• Non-return valves
• Pressure tanks
• Large elevated storage tanks
• Water distribution systems
• Correctly engineered solar pumping systems

Performance Guide

Actual water output depends on total dynamic head, borehole yield, pipe diameter, friction losses and complete system configuration.

Mini FAQ

1. How much water can the Doyin 4SP8-21 deliver?
Maximum flow is approximately 10.8m³/h, equivalent to 10,800 litres per hour.

2. What is the maximum head?
The Doyin 4SP8-21 has a maximum specified head of approximately 125 metres.

3. What motor should be paired with this pump body?
It is designed for pairing with a compatible 4.0HP submersible motor.

4. Is it suitable for high-demand farm water systems?
Yes. Its combination of 10,800L/h maximum flow and 125m maximum head makes it suitable for appropriately sized agricultural water-storage and transfer applications.

5. Does Macire provide technical support and delivery?
Yes. Macire provides technical guidance on pump selection and supports delivery across Kenya.

Why Buy from Macire

• Genuine Doyin pumping products.
• Product verification before dispatch.
• Technical guidance on borehole pump selection.
• Assistance with pump-body and motor matching.
• Compatible controllers and protection equipment available.
• Borehole system-sizing and installation guidance.
• After-sales technical support.
• Access to compatible spares and components.
• Kenya-wide delivery.
• Support for agricultural, residential and commercial water systems.