DOYIN 4SDM3/22 2HP Single-Phase AC Submersible Pump — 1.25" Outlet

The DOYIN 4SDM3/22 is a durable 2HP single-phase AC submersible pump with an ordinary impeller, built for mid-to-deep boreholes. With a 1.25-inch outlet and a flow rate of 4.8m³/h (4,800 litres per hour), it delivers solid lifting capacity — rated for a recommended depth of up to 141 metres, with a maximum head of 158M.

Running on standard single-phase AC power, the 4SDM3/22 is a practical option for properties without three-phase supply — common across many residential and small commercial sites in coastal Kenya. It fits domestic boreholes, community water points, and small-to-mid water supply needs in Mombasa, Malindi, Diani, Kilifi, and Lamu.

As a single-phase AC pump, the 4SDM3/22 requires a matching AC controller (DOYIN's DYM-S03 unit) sized to its 2HP rating for correct, protected operation. It is not solar-compatible in this configuration and is best suited to properties with stable single-phase grid or generator power.

CoastalSolar Africa supplies, sizes, and installs the 4SDM3/22 pump, including the correctly matched DYM-S03 controller, across the coastal region.

Specifications:

• Model: 4SDM3/22
• Power: 2HP, single-phase AC
• Impeller: Ordinary
• Outlet size: 1.25 inches
• Max flow: 4.8m³/h (4,800L/h)
• Max head: 158M
• Recommended depth: 0–141M
• Power source: Single-phase AC (grid or generator)
• Required controller: DOYIN DYM-S03 AC controller
• Application: Domestic boreholes, community water points, small-to-mid water supply

FAQs:

Does this pump run on solar power?
No — the 4SDM3/22 is a single-phase AC pump requiring standard grid or generator power. For solar-powered options, ask about DOYIN's DC or hybrid AD pump range.

What controller does this pump need?
It requires the DOYIN DYM-S03 AC controller, specifically matched to this model — CoastalSolar Africa can supply and fit this correctly.

How does this compare to the 4SDM3/30 (3HP)?
The 4SDM3/30 uses the larger DYM-S04 controller and reaches greater depth (192M vs 141M recommended) at a higher 3HP rating — the 4SDM3/22 is the more economical choice where 141M depth is sufficient.

Do you install this pump in Kilifi and Malindi?
Yes, CoastalSolar Africa supplies and installs the 4SDM3/22 pump with its matched controller across Mombasa, Malindi, Diani, Kilifi, Lamu, and the wider coastal region.

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