Wilo-Sub TWU 4-...-GT

Series description

Your advantages

  • Low operating costs thanks to optimised hydraulics and efficient motors for targeted use in geothermal applications
  • High annual performance factor (JAZ) through increased system effectiveness
  • High operational reliability thanks to floating impellers and integrated non-return valve
  • Easy installation thanks to Quick-Connect variant for extending the motor cable easily and quickly


Multistage 4" submersible pump in jacketed construction for vertical and horizontal installation


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


  • Multistage submersible pump with radial or semi-axial impellers
  • Hermetically sealed motors
  • Integrated non-return valve
  • NEMA coupling
  • Three-phase current motor

Scope of delivery

  • Hydraulics and motor ready assembled
  • Connection cable with drinking water approval (TWU 4-…-GT with 15 m cable; TWU 4-…-QC-GT with short cable and plug for rapid replacement)
  • Installation and operating instructions

Type key


Wilo-Sub TWU 4-0203-C-QC-GT


Submersible pump


Diameter of the hydraulic unit in inches ["]


Rated volume flow [m3/h]


Number of hydraulic stages


Series generation


Motor shroud in 1.4571, motor connection via flat male tab


Quick Connect cable for simple and fast extension of the motor cable


for geothermal applications

Technical data

  • Mains connection: 3~400 V, 50 Hz
  • Submerged operating mode: S1
  • Fluid temperature: 3 – 30 °C
  • Minimum flow rate at motor: 0.08 m/s
  • Max. sand content: 50 g/m3
  • Max. number of starts: 20/h
  • Max. immersion depth: 200 m
  • Protection class: IP68
  • Pressure connection: Rp 1¼


  • Hydraulics housing: Stainless steel 1.4301
  • Impellers: Noryl
  • Hydraulic shaft: Stainless steel 1.4104
  • Motor housing: Stainless steel 1.4301
  • Motor shaft: Stainless steel 1.4305


Submersible pump for vertical or horizontal installation.


Multistage submersible pump with radial or semi-axial impellers in sectional construction. Integrated non-return valve. All parts that come in contact with the fluid are made of corrosion-free materials.


Corrosion-free three-phase AC motor for direct starting. Sealed and hermetically cast motor with enamel-insulated winding, resin-impregnated, self-lubricating bearing, with water-glycol filling.


The motor is cooled by the pumped fluid. The motor must always be immersed when operated. The limit values for maximum fluid temperature and minimum flow velocity must be adhered to. Vertical installation is possible with or without cooling jacket. Horizontal installation must be performed in conjunction with a cooling jacket.


REACH regulation

Edition 2020-08
Page format 209.9 x 296.7 mm
Number of pages 4

PDF (1 MB)


Wilo-EMU D/DCH/K/KM/SCH (w/o motor), Wilo-Sub TWI/TWU (w/o motor), Wilo-Actun ZETOS-K8 (w/o motor), Wilo-Actun ZETOS-K10 (w/o motor)

Article Number 6080455
Edition 2020-08
Version number 05
Page format 209.9 x 297.0 mm
Number of pages 68

PDF (5 MB)


General overview 2020 International version

Edition 2020
Version number 1
Page format 209.9 x 297.0 mm
Number of pages 78

PDF (48 MB)



PDF: Wilo-Sub TWU 4-...-GT


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