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Wilo-Rexa FIT-S | Wilo
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Wilo-Rexa FIT-S

Efficient submersible sewage pump in non-clog design with macerator for reliable pressure drainage in commercial properties.

Your advantages
Wilo-Rexa-FIT-S

Efficient submersible sewage pump in non-clog design with macerator for reliable pressure drainage in commercial properties.

The Wilo-Rexa FIT-S03 grinder pump ensures reliable pressure drainage in accordance with EN 12050-1 in commercial applications. The radial macerator with double shear effect reliably shreds the solids. Clogging is prevented and safe operation is ensured. In addition, the overall costs are significantly minimised. Firstly, the optimised hydraulics provide a high degree of efficiency along with the maximum delivery head. Secondly, the smallest possible pipework can be connected. The high-quality stainless steel motor is light and easy to maintain. On the other hand, the motor is extremely corrosion-resistant, even when the motor is non-immersed. A high-quality seal with two mechanical seals ensures a long service life.

Recommended services

Commissioning
Maintenance

Your advantages

  • A radial macerator with double shear effect provides excellent clogging resistance
  • Optimised hydraulics/macerator combination for a broad cover of the delivery head
  • Use of the smallest possible pipework guarantee low overall installation costs
  • Developed for easy selection to meet the requirements of different building types
  • High-quality motor with two mechanical seals and optional monitoring of the sealing chamber ensure long service life
  • Stainless-steel motor housing provides high resistance to corrosion, even when the motor is non-immersed

Product features

  1. Radial macerator with double shear effect
  2. Motor made of corrosion-resistant stainless steel
  3. Motor seal with two mechanical seals
  4. Optional monitoring of the sealing chamber
  5. Version with float switch available for level-dependent control
Series description
Wilo-Rexa FIT-S

Design type

Fully submersible grinder pump for stationary and portable wet installation in intermittent operation.

Liquid

For pumping in commercial areas of:

  • Sewage containing faeces
  • Wastewater (with small amounts of sand)

Sewage pumping according to 12050

The pumps meet the requirements of EN 12050-1.

Equipment/function

  • Radial macerator with double shear effect
  • Thermal motor monitoring with bimetallic sensor
  • Single-phase AC motor with self-switching thermal motor monitoring
  • Single-phase AC motor with separate capacitor switchgear
  • Different versions:
    • Version “P”: with plug
    • Version “A”: with float switch and plug
    • Version “O”: bare cable ends

Typekey

Example:

Rexa FIT-S03-123A/21M015-523/P

Rexa

Submersible sewage pump

FIT

Series

S

Macerator

03

Nominal diameter of the discharge port: DN 32/40

123

Hydraulics type

A

Material version: Standard

2

Number of poles

1

IE class

M

Mains connection version:

  • M = single-phase current (1~)
  • T = three-phase current (3~)

15

Value/10 = Rated power P in kW

-

Not Ex-rated

5

Mains frequency: 5 = 50 Hz/6 = 60 Hz

23

Key for rated voltage

P

Additional electrical equipment:

  • O = with bare cable end
  • P = with plug
  • A = with float switch and plug

Technical data

  • Mains connection: 1~230 V, 50 Hz or 3~400 V, 50 Hz
  • Submerged operating mode: S1
  • Non-immersed operating mode: S2-15 min; S3 10%
  • IP rating: IP68
  • Insulation class: F
  • Fluid temperature: 3 … 40 °C (37 … 104 °F)
  • Fluid temperature, max. 60 °C (140 °F) for 3 min

Materials

  • Pump housing: EN-GJL-250 (ASTM A48 Class 35/40B)
  • Impeller: EN-GJL-250 (ASTM A48 Class 35/40B)
  • Macerator: 1.4528/59 HRC (AISI 440B+Co)
  • Motor housing: 1.4301 (AISI 304)
  • Shaft: 1.4401 (AISI 316)
  • Seal on the motor side: C/MgSiO
  • Seal on the fluid side: SiC/SiC
  • Seal, static: NBR (nitrile)

Construction

Rexa FIT-S ... /M ... /P

Submersible pump with radial macerator with double shear effect. Horizontal discharge port with flange and oval connection. Hydraulics housing and impeller made of grey cast iron; macerator made of hardened steel for blades. Surface-cooled 1~ motor with self-switching thermal motor monitoring. Oil-filled sealing chamber with two mechanical seals. Stainless steel motor housing. Detachable connection cable with capacitor box and plug (CEE 7/7). The pump may be used in Zone 2 hazardous areas.

Rexa FIT-S ... /M ... /A

Submersible pump with radial macerator with double shear effect. Horizontal discharge port with flange and oval connection. Hydraulics housing and impeller made of grey cast iron; macerator made of hardened steel for blades. Surface-cooled 1~ motor with self-switching thermal motor monitoring. Oil-filled sealing chamber with two mechanical seals. Stainless steel motor housing. Detachable connection cable with capacitor box, float switch and plug (CEE 7/7). The pump must not be used in hazardous areas.

Rexa FIT-S ... /T ... /O

Submersible pump with radial macerator with double shear effect. Horizontal discharge port with flange and oval connection. Hydraulics housing and impeller made of grey cast iron; macerator made of hardened steel for blades. Surface-cooled 3~ motor with thermal motor monitoring. Oil-filled sealing chamber with two mechanical seals. Stainless steel motor housing. Detachable connection cable with bare cable ends. The pump may be used in Zone 2 hazardous areas.

Scope of delivery

  • Pump
  • Installation and operating instructions

Accessories

  • Connection cable with fixed cable lengths:
    • 1~ motor: up to max. 30 m (98 ft).
    • 3~ motor: up to max. 50 m (164 ft).
  • External pencil electrode for monitoring the sealing chamber
  • Suspension unit for wet installation
  • Pump support foot for portable installation
  • Level control devices
  • Fixation sets with bonded anchor
  • Fixation accessories and chains
  • Switchgear, relays and plugs
Documents

Installation and operating instructions

Wilo-Rexa FIT-S

Article Number 6092602
Edition 2025-06
Number of pages 24
Language en
PDF (5 MB)

Certification booklet

Wilo-Rexa FIT

Article Number 6069823
Edition 2021-03
Number of pages 12
Language language neutral
PDF (3 MB)

Brochure

Wilo grinder pumps - Chopping solids for more operational reliability.

Number of pages 12
Language en
PDF (3 MB)

Group Statement

Group Statement REACH

Edition 2021-05
Number of pages 5
Language language neutral
PDF (287 KB)
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