Pedrollo 4SR4 submersible pumps are specifically designed for water supply from boreholes, though can also be used in other submersible applications in either vertical or horizontal configuration. They feature a hydraulic design that incorporates floating impellers which together with especially resistant component materials provide high resistance to sand content in the pumped water.

The pump impellers and diffusers are made from engineering plastic while the stage casings, top housing, suction connector, pump sleeve and shaft are made of AISI 304 stainless steel. The pump is supplied with a 1.5m tail cable.

Pumps are coupled to Pedrollo two pole sealed oil filled motor constructed principally from AISI 316 stainless steel. QEM Control box is available for single phase pumps which incorporates a fused rotary switch, run indicator light, DOL starter and capacitor which can be connected directly to the mains power supply. Three phase motors require a remote starter and if irregular electrical supply is prevalent an additional quick tripping voltage sensing relay is recommended.

Enclosure Class : IP68
Insulation Class: F
Speed: 2900rpm

Pumped Liquid: Thin, clean, chemically non aggressive liquids with a maximum sand content of 150gm/m³.
Max. Liquid Temperature: +30°C.
Min. Borehole Diameter: 110mm
Max. Immersion Depth: 100m


Model Power(kW)   Current (A) DN(") Dimensions (mm) Weight (kg)
kW HP 1x240V 3x415V H1 H2
4SR4/6 0.55 0.75 5   313 331 11
4SR4/8 0.75 1 6   363 356 13
4SR4/12 1.1 1.5 8   462 396 16
4SR4/15 1.5 2 11 5 563 437 18
4SR4/22 2.2 3 15 6 737 492 23
4SR4/30 3 4   7 963 450 24
4SR4/40 4 5.5   9 1264 505 32
4SR4/54 5.5 7.5   12 1684 590 39