S4 Series – Submersible Sewage Pumps for Wastewater with Suspended Solids
JS S4 submersible pumps are designed for reliable sewage handling in municipal, industrial, and commercial systems. Operating at 4-pole motor speed, they deliver smoother performance with longer wear life, while the non-clog single-channel impeller enables efficient transfer of liquids containing solids. Ideal for demanding sewage and drainage installations, especially where maintenance safety and solid-handling capacity are critical.
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Non-clog single-channel impeller passes suspended solids without clogging
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4-pole motor operation ensures lower wear and longer service intervals
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Double mechanical seals and shaft sleeve reduce risk of failure in abrasive conditions
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Thermal overload protection shields the motor from overheating or high current
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Class F motor insulation allows continuous operation at high temperatures
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Additional lip seal protects mechanical seals from impurities
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Slide rail kits available for safer and easier maintenance access
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Enhanced cable entry sealing improves long-term water ingress protection
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S4
Easily compare the hydraulic performance of all S4 sewage pump models using the performance chart. It shows how flow rate (m³/h) varies with head (m) across models — helping you choose the best pump for high-solids wastewater, sludge transfer, or municipal sewage systems.
Model table Sewage Pumps/S4
Models from 1.5 kW to 3.7 kW, head up to 17.5 m, capacity up to 126.6 m³/h, and solids handling up to 75 mm
All models are equipped with 3-phase 200–600V power supply/
Come with a standard 10-meter cable.
Construction Material:
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Abrasive resistant high chrome iron impeller suction wear plate.
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Built-in agitator helps to swirl up solids before discharging.
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Double mechanical seals in a separate oil chamber.
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Class H motor insulation.
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Shaft sleeve saves on shaft wear due to abrasives and corrosion.
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Additional lip seal protection keeps impurities and abrasives away from the mechanical seals.
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Thermal overload protection guards against high amperage and high temperature.
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Enhanced cable entry sealing system.
Dimensions(mm)
Watch KZN pumps in action — real-world performance footage
