Wilo-Actun FIRST-SPU4 | Wilo
Your advantages

Your advantages

  • Durable, as all parts that come into contact with the fluid are non-corrosive.
  • Integrated non-return valve
  • Low-wearing due to floating impellers
  • Easy maintenance motor
Series description
Wilo-Actun FIRST SPU 4


Multistage 4" submersible pump with a shroud design for vertical and horizontal installation


  • For water supply from boreholes and rainwater reservoirs
  • For domestic water supply, sprinkling and irrigation
  • Pressure boosting
  • Lowering of the water level
  • For pumping water without long-fibre, abrasive constituents


  • Multistage submersible pump with radial and semi-axial impellers
  • Rewindable, oil-filled motor
  • Integrated non-return valve
  • NEMA coupling
  • Single-phase or three-phase AC motor

Scope of delivery

  • Hydraulics + motor completely assembled
  • 2.0/2.5 m connection cable (cross-section: 4 x 1.5 mm2)
  • Installation and user manual

Type key


Wilo-Actun FIRST SPU4.01-10-B/XI4-50-1-230


Product family


Series designation


Type name (“Submersible pump for universal use” with plastic impellers)


Pump nominal diameter in inches


Rated flow rate in m³/h


Number of stages


Technical generation


Identifies a fitted motor, series with predominantly rust-free steel (inox)


Motor nominal diameter in inches


Electric version; 50 Hz, 1~ 230 V

Technical data

  • Mains connection: 3~400 V, 50 Hz
  • Submerged operating mode: S1
  • Fluid temperature: 3-30 °C
  • Minimum flow rate at motor: 0.2 m/s or 0.5 m/s (depending on performance)
  • Max. sand content: 50 g/m3
  • Max. number of starts: 10 -20/h (depending on performance)
  • Max. immersion depth: 200 m
  • Protection class: IP68
  • Pressure connection: NPT 1¼, NPT 1½, NPT 2


  • Hydraulics housing: Stainless steel 1.4301
  • Impellers: Noryl
  • Pump shaft: 1.4104 stainless steel
  • 1.4301 stainless steel motor housing
  • Motor shaft: 1.4305 stainless steel


Submersible pump for vertical and horizontal installation.


Multistage submersible pump with radial or semi-axial impellers with a shroud design. Integrated non-return valve. All parts that come into contact with the fluid are made from corrosion-resistant materials.


Rewindable, corrosion-resistant alternating current motor or three-phase current motor for direct starting. Sealed using a mechanical seal with self-lubricating bearings with oil filling.


The motor is cooled by the fluid. The motor must always be immersed when operated. The limit value for the maximum fluid temperature may not be exceeded. The limit value for the minimum volume flow may not be exceeded. Vertical installation is possible with or without cooling shroud. A cooling shroud is required for horizontal installation.


Certification booklet

Certification booklet Wilo-Actun FIRST-SPU4

Article Number 6053358
Edition 2020-08
Page format 209.9 x 297.0 mm
Number of pages 12
PDF (2 MB)

Certificate REACH (Documents)

REACH regulation

Edition 2020-08
Page format 209.9 x 296.7 mm
Number of pages 4
PDF (1 MB)
Product list
Number of results: 96
Product descriptionMains connectionMotor diameter DMMax. delivery head HmaxMax. volume flow QmaxRated power P2Gross weight, approx. mArticle number