4” Fabricated Submersible Pumps

W Series

The Sterling Pumps W series Stainless Steel Submersible Pumps have been designed for pumping water for a diverse range of pumping duties for domestic house water supply, irrigation and agricultural, home reticulation systems, cattle and stock watering, solar pumping, mining, industrial and municipal applications.

Construction is from 304 stainless steel. The 4” W series feature radial impellers, stainless steel bowls, motor bracket, discharge head and all have integral check valves.


  • All stainless steel construction, 304 SS
  • Radial impeller W1, W2, W3, W5 and Mixed impeller W8 and W14
  • Series, maximum flow; 18.8 m³/h, maximum head; 547 metres
  • Bearings are water lubricated and are shaped to enable sand particle to pass through with the pumped water
  • Stop Ring to assist to minimise wear from start up for any up thrust.
  • Inlet strainer
  • Check Valve to prevent back flow and minimise water hammer
  • High efficiency
  • Pump inlet conforms to NEMA standard for submersible motors
  • BSP outlet thread as standard, NPT available
    1-1/4″BSP; W1, W2, W3. 1-1/2″BSP: W5. 2″BSP; W8 and W14
  • Water temperature 0°C up to 45°C
  • Solids handling Maximum sand/solids in water; 50 g/m³
  • Pump/motor Performance Based on 2,900 rpm, 2 pole 50 Hz
  • Max. starts per hour 20 at regular intervals
  • Direction of rotation Clockwise as seen from the pump coupling side


4″ W series models
Nominal flow ratings* W2, W5 and W8 (m³/h)
Maximum flow up to 11 m³/h
Maximum head up to 540 metres
Discharge threads; W2 1-1/4”BSP, W5 1-1/2″BSP, W8 2″BSP
Motors 0.37 kW up to 11 kW
*Other ratings on request


Contact Sterling Pumps for more information