Wilo-Sub TWI 10 | Wilo
Your advantages
Wilo-Sub TWI 8

Your advantages

  • Energy-efficient, optimised hydraulics with efficiency of up to 80 %
  • Long service life thanks to corrosion-resistant stainless steel, optionally in V4A quality
  • ACS certified for drinking water applications
  • High range of performance from 1 to 250 m³/h
  • A high degree of flexibility thanks to versions in the 4, 6, 8 and 10-inch area
Series description


Multistage 10" submersible pump in tie strap version for vertical or horizontal installation


  • For water and drinking water supply from boreholes and rainwater storage
  • Process water supply
  • For municipal water supply, sprinkling and irrigation
  • Pressure boosting
  • Lowering of the water level
  • For pumping water in industrial applications
  • For pumping water without long-fibre and abrasive constituents


  • Multistage submersible pump with semi-axial impellers
  • Integrated non-return valve, spring-loaded
  • NEMA coupling up to 8" motor connection, standardised connection for 10" motor and larger
  • Three-phase current motor
  • Hermetically sealed motors
  • Rewindable motors



Wilo-Sub TWI 010.125-02-C + NU 611T-2/18


TWI 010.125-02-C




Configurable series


Diameter of the hydraulic unit in inches ["]


Rated volume flow [m3/h]


Number of hydraulic stages

Impeller diameter (without = standard, S = trimmed)


Series generation


NU 611T-2/18


Submersible motor


Size (5…, 6... = 6"; 7…, 8… = 8"; 9... = 10")


Motor filling (without = standard, T = drinking water)


Number of poles


Package length

Technical data

  • Mains connection: 3~400 V, 50 Hz
  • Submerged operating mode: S1
  • Fluid temperature:
    • Hermetically cast motors: 3-20 °C or 3-30 °C (depending on type)
    • Rewindable motors: 3-30 °C (depending on type)
  • Minimum flow rate at motor: 0.1-0.5 m/s (depending on type)
  • Max. sand content: 50 g/m3
  • Max. number of starts: 10-20/h (depending on type)
  • Max. immersion depth: 100 – 350 m (depends on type)
  • Protection class: IP68
  • Pressure connection: Rp 6


  • Hydraulics housing: Stainless steel 1.4301
  • Impellers: Stainless steel 1.4301
  • Hydraulic shaft: Stainless steel 1.4057
  • Motor housing: EN-GJL or stainless steel 1.4301
  • Motor shaft: Stainless steel 1.4542 or 1.4462 (depending on type)


Submersible pump with ACS approval for vertical or horizontal installation.


Multistage submersible-motor pump with 6/8"-NEMA- or from 10" and larger with standardised connection and 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.


Three-phase motor for direct or star-delta start. Sealed, hermetically cast motor, resin-impregnated, with enamel-insulated winding or rewindable motor with PVC-insulated winding, self-lubricating bearing, with water-glycol filling. Motors of the NU 611, NU 8..., NU 9... series are also available in drinking water version (T version).


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.

Pressure shroud

The pressure shroud is used for the direct installation of the unit in the pipe system. Standard models are without mounted non-return valves. The maximum inlet pressure is 10 bar.

Delivery state

  • Hydraulics + motor completely assembled
  • Connection cable approved for drinking water, cable cross-section and length per standard design or per customer request
  • Installation and operating instructions

General overview (Documents)

General overview 2019 International version

Article Number 2200591
Edition 2018
Page format 209.9 x 297.0 mm
Number of pages 74
PDF (40 MB)

General overview 2021 International version

Edition 2020
Page format 209.9 x 297.0 mm
Number of pages 74
PDF (10 MB)

Certification booklet

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 2021-06
Page format 209.9 x 297.0 mm
Number of pages 72
PDF (7 MB)

Certificate REACH (Documents)

REACH regulation

Edition 2021-10
Page format 209.9 x 297.0 mm
Number of pages 2
PDF (162 KB)