Wilo-Rexa SOLID

Series description

Special features/product advantages

  • Maximum operational reliability and reduced service costs, especially for pumping untreated sewage, thanks to self-cleaning properties
  • Lower energy costs thanks to outstanding hydraulic efficiency and up to IE5 motor technology in wet and dry well installation (based on IEC TS 60034-30-2)
  • Corrosion protection provided by an optional Ceram coating for a long service life in aggressive media
  • An optional Digital Data Interface (DDI) with integrated vibration monitoring, data logger, web server and digital rating plate for convenient monitoring and system integration
  • Nexos Intelligence can be integrated for pump and system optimisation


Pumping untreated sewage is becoming increasingly demanding due to the growing prevalence of solids and fibrous material which, in turn, leads to increased operating costs. The new Wilo-Rexa SOLID-Q with Nexos Intelligence is characterised by operational reliability, energy efficiency and the highest level of digital networking. The smart combination for cost effectiveness combined with the additional convenience in your day-to-day work.

Design type

Submersible sewage pump with and without active cooling system for pumping untreated sewage for continuous duty in the stationary and portable wet well installation, as well as for stationary dry well installation.


Pumping of

  • Untreated sewage with faeces and long-fibre components
  • Sewage containing faeces
  • Process water


  • Surface-cooled motors or self-cooling motors with active cooling system
  • Asynchronous motors up to efficiency class IE3
  • Permanent magnet motors up to efficiency class IE5
  • Longitudinally watertight cable inlet

Scope of delivery

  • Submersible sewage pump
  • Connection cable with bare cable ends
  • Fitted accessories
  • Operating and maintenance manual

Type key


Wilo-Rexa SOLID-Q15-98A + FKT 20.2M-4/32GX-P4




Submersible sewage pump with SOLID hydraulics


x10 = discharge port nominal diameter, e.g. DN 150


Performance indicator


Material design

  • A = standard design
  • B = corrosion protection 1
  • D = abrasive protection 1


SOLID impeller

  • T = closed two-channel impeller
  • G = semi-open single-channel impeller
  • Q = half-open two-channel impeller


FKT 20.2M-4/32GX-P4


Motor type:

T = surface-cooled motor without cooling system

FK, FKT, HC = self-cooling motor with active cooling system




Distinctive number


Shaft design

M = standard design

L = reinforced design


Number of poles


x10 = package length in mm


Seal version:

G = two separate mechanical seals

K = block seal cartridge with two mechanical seals




Motor design

  • E = asynchronous motor
  • P = permanent magnet motor
  • 4 = IE class (derived from ISO 60034-30)

Technical data

  • Mains connection: 3~400 V, 50 Hz
  • Submerged operating mode: S1
  • Non-immersed operating mode: S1 (FK, FKT, HC motor) or S2 (T motor, depending on performance)
  • Protection class: IP68
  • Fluid temperature: 3 - 40 °C, higher temperatures on request
  • Free ball passage:
    • T impeller: 78x105…150x150 mm
    • G impeller: 80 bzw. 90 mm
    • Q impeller: 78 mm
  • Max. immersion depth: 20 m


  • Housing components: EN-GJL-250 or EN-GJS-500-7
  • Impeller: EN-GJL-250 or EN-GJS-500-7
  • Static gaskets: FPM
  • Sealing on pump side: SiC/SiC
  • Sealing on motor side: FPM, carbon/ceramic or SiC/SiC
  • Shaft: Stainless steel 1.4021


Submersible sewage pump as submersible monobloc unit for stationary and portable wet well and dry well installation. Portable installation is possible, depending on type.


The outlet on the pressure side is designed as horizontal flange connection. The maximum possible dry matter is 8 %. The following impeller types are utilised:

  • T = closed two-channel impeller
  • G = semi-open single-channel impeller
  • Q = half-open two-channel impeller

At the SOLID-G and SOLID-Q impellers the gap between suction port and impeller can be readjusted later. This ensures uniform hydraulic efficiency.


Submersible motors with passive and active cooling are used for the drive:

  • T motors (surface-cooled motors) have passive cooling. They emit their heat directly into the surrounding fluid via the housing parts. For this reason, these motors can operated immersed in continuous duty (S1), depending on performance, and non-immersed in short-time duty (S2).
  • FK, FKT and HC motors are self-cooling and have an active cooling system. The waste heat is guided via the coolant (white oil or water-glycol mixture) to an integrated heat exchanger, and this releases the waste heat to the conveyed medium. As a result, these motors are suitable for continuous duty (S1) either in immersed or non-immersed state.

All motors have a sealing chamber that protects the motor from fluid ingress. It can be accessed from the outside and can be monitored with an optionally sealing chamber electrode. All filling fluids used are potentially biodegradable and environmentally safe.

In addition, depending on performance, high-efficiency motors are also available:

    • IE3* efficiency class asynchronous motors
    • IE4/5* efficiency class permanent magnet motors

* (IE3/4 = derived from IEC 60034-30, IE 5 = derived from IEC TS 60034-30-2)

The cable inlet on the motors is longitudinally watertight, cable lengths can be individually configured.


Fluid-side and motor-side sealing is possible in the following versions depending on the motor type:

  • Version G: Two independently-acting mechanical seals
  • Version K: Block seal cartridge with two independently acting mechanical seals


REACH Regulation

Edition 2018-10
Page format 209.9 x 296.7 mm
Number of pages 4

PDF (19 MB)


Wilo-Rexa SOLID-Q - The intelligent system solution for a smart sewage pump station

Page format 209.9 x 297.0 mm
Number of pages 16

PDF (16 MB)


General overview 2018 International version

Article Number 2200591
Edition 2018
Version number 1
Page format 209.9 x 297.0 mm
Number of pages 72

PDF (11 MB)


Wilo FK motor: EMU FA, Rexa SUPRA, Rexa SOLID

Article Number 6074704
Edition 2019-01
Version number 04
Page format 209.9 x 297.0 mm
Number of pages 1360

PDF (13 MB)


Wilo HC motor: EMU FA, Rexa SUPRA, Rexa SOLID

Article Number 6073324
Edition 2019-01
Version number 02
Page format 209.9 x 297.0 mm
Number of pages 1356

PDF (15 MB)


Wilo T motor: EMU FA, Rexa SUPRA, Rexa SOLID

Article Number 6067561
Edition 2019-01
Version number 04
Page format 209.9 x 297.0 mm
Number of pages 1688

PDF (28 MB)


PDF: Wilo-Rexa SOLID


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