The 358m Doyin 4SD3/50 AC Borehole Submersible Water Pump is a high-head pumping solution engineered for ultra-deep boreholes where exceptional lifting capability and reliable water delivery are required. Equipped with a powerful 5.5HP AC motor, it delivers up to 4.8m³/h (4,800 litres per hour) while achieving an outstanding maximum head of 358 metres, making it suitable for some of the deepest borehole installations.

The pump features Doyin’s proven Ordinary Impeller multi-stage hydraulic design, which generates the pressure needed to deliver water over long vertical distances while maintaining dependable flow. It is an excellent choice for commercial developments, large farms, institutions, hotels, high-rise buildings and community water projects where consistent water supply is essential.

Manufactured with corrosion-resistant materials and precision-engineered internal components, the 4SD3/50 is designed for continuous operation, offering long service life and dependable performance under demanding working conditions.

Supplied and verified by Macire, this genuine Doyin borehole pump is backed by expert technical guidance, nationwide delivery and reliable after-sales support.

⭐ Genuine Product | Verified & Supported by Macire

Pump Design & Construction

High-Performance AC Motor

• Powerful 5.5HP AC motor
• Copper-wound stator for improved efficiency
• Continuous-duty operation
• Water-cooled motor design
• Stable performance under heavy workloads

Hydraulic Pump Assembly

• Multi-stage Ordinary Impeller
• High-pressure pumping system
• Designed for ultra-deep boreholes
• Stable flow at high pumping heads
• Reliable long-term operation

Heavy-Duty Construction

• Stainless steel pump body
• Corrosion-resistant hydraulic components
• Heavy-duty mechanical seals
• Precision-machined shaft
• Built for clean borehole water applications

Technical Specifications

Key Features

• Powerful 5.5HP AC motor for demanding deep borehole applications
• Pumps up to 4,800 litres per hour
• Exceptional 358-metre maximum pumping head
• Multi-stage Ordinary Impeller for reliable high-pressure water delivery
• Copper-wound motor for improved durability and efficiency
• Stainless steel construction resists corrosion
• Designed for continuous-duty operation
• Stable performance in ultra-deep boreholes
• Suitable for commercial, agricultural and institutional water supply
• Low-maintenance hydraulic design
• Genuine Doyin quality supplied by Macire

Applications

🏢 High-rise residential and commercial buildings

🚜 Large-scale irrigation projects

🏨 Hotels and lodges

🏫 Schools and institutions

🏭 Industrial water supply

💧 Community water projects

🐄 Livestock farms

🏘 Deep residential boreholes

Installation Recommendations

For optimum performance, Macire recommends:

• Heavy-duty motor control panel with overload protection
• High-quality submersible power cable
• HDPE rising main
• Stainless steel safety wire
• Non-return valve
• Borehole well cap
• Dry-run protection
• Surge and lightning protection

Professional installation ensures maximum performance and long service life.

Care & Maintenance

• Monitor motor current regularly.
• Inspect discharge pressure periodically.
• Check electrical connections and control panel.
• Prevent dry running.
• Flush the system if excessive sand is present.
• Service according to manufacturer recommendations.
• Use genuine replacement parts when required.

Performance Guide

Actual performance depends on borehole conditions, pipe sizing and installation quality.

Frequently Asked Questions

1. Is this pump suitable for ultra-deep boreholes?

Yes. With a maximum head of 358 metres, it is designed for very deep borehole installations.

2. What is the maximum water output?

The pump delivers up to 4.8m³/h (4,800L/h) depending on the total dynamic head.

3. What type of impeller does it use?

It uses a durable multi-stage Ordinary Impeller designed for dependable high-pressure water delivery.

4. Can it run continuously?

Yes. The heavy-duty AC motor is built for continuous operation in demanding commercial and agricultural applications.

5. Does Macire provide technical support?

Yes. Macire offers pump sizing, installation guidance, nationwide delivery and dependable after-sales support.

Why Buy from Macire

• Genuine Doyin borehole pumps
• Professional pump sizing assistance
• Nationwide delivery across Kenya
• Technical support before and after installation
• Genuine accessories and spare parts
• Reliable after-sales service
• Competitive pricing
• Trusted supplier of water pumping solutions
• Expert installation guidance
• Long-term customer support

⭐ Verified & Supported by Macire

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