Wilo-Padus UNI | Wilo

Wilo-Padus UNI

The flexible drainage pump for a diverse range of fluids.

Your advantages
Wilo-Padus UNI

The flexible drainage pump for a diverse range of fluids.

The Wilo-Padus UNI is the ideal entry-level model for wastewater transport in small commercial buildings. The pump can be used flexibly as a portable device or in a pump chamber. Hydraulics made from corrosion-free composite material provide high levels of reliability for universal use in the pumping of a diverse range of fluids. Installation is made very simple due to its low weight, integrated capacitor and threaded connection. A double mechanical seal and the large sealing chamber facilitate long maintenance intervals. Direct access to the most important components make maintenance work very convenient. By utilising Wilo-Control switchgears, the Wilo-Padus UNI can also be integrated into existing building management systems.

Your advantages

  • Exceptional reliability owing to corrosion-free hydraulics for universal applications and various fluids
  • Easy installation thanks to its low weight, integrated capacitor at the AC motor and threaded flange
  • Optimum efficiency and high operational reliability owing to improved hydraulics
  • Quick maintenance facilitated by direct access to the sealing chamber and pump housing
  • Long maintenance intervals thanks to double mechanical seal and large volume sealing chamber
  • Clog-proof thanks to the integrated strainer

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Series description
Wilo-Padus UNI


Submersible drainage pump for intermittent operation for portable wet well installation


Pumping of

  • Sewage not containing faeces (EN 12050-2)
  • Wastewater
  • Fluids with a pH value of > 4.5
  • Material version "B": Aggressive fluids, e.g. lake/sea water, condensate, distilled water


  • Winding temperature monitoring with bimetallic strip
  • Ready-to-plug (versions A and P)
  • Float switch (version A)
  • Vertical float switch (version VA)

Scope of delivery

  • Submersible drainage pump with 10 m cable
  • Operating and maintenance manual

Type key


Wilo-Padus UNI M05B/T15-540/A


Submersible drainage pump with centrifugal hydraulics


Series with copolymer hydraulics


Open multi-channel impeller


Nominal diameter of the pressure connection: G2



None = standard version

B = motor housing in V4A

K = motor with sheath flow cooling


Mains connection version:

M = 1~

T = 3~


Value/10 = motor power P2 in kW


Frequency (5 = 50 Hz, 6 = 60 Hz)


Rated voltage code


Additional electrical equipment:

No supplement = With bare cable end

P = with plug

A = with float switch and plug

VA = Vertical 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%
  • Non-immersed operating mode "K" version: S1
  • Pressure connection: G2
  • Protection class: IP68
  • Insulation class: F
  • Fluid temperature: 3 – 40 °C, max. 60 °C for 3 min
  • Free passage: 10 mm
  • Cable length: 10 m


  • Motor housing: 1.4301
  • Hydraulics housing: PP-GF30 (copolymer)
  • Impeller: PP-GF30 (copolymer)
  • Static gaskets: NBR
  • Sealing on pump side: SiC/SiC
  • Sealing on motor side: C/Cr
  • Shaft end: Stainless steel 1.4401

In material version "B", all parts that come in contact with the fluid are made of stainless steel 1.4401 (AISI 316).


Submersible drainage pump as submersible monobloc unit for portable wet well installation.


The outlets on the pressure side are designed as vertical threaded flange connections. Open multi-channel impellers are used as the impeller shape. A strainer is integrated at the hydraulics housing.


Surface-cooled motors or sheath flow-cooled motors in single-phase current version (with built-in operating capacitor) and three-phase current version for direct starting are used:

  • Surface-cooled motors: The waste heat is given off directly to the surrounding fluid via the motor housing. These motors can operated immersed in continuous duty (S1) and non-immersed in short-time duty (S2) or intermittent periodic duty (S3).
  • Sheath flow-cooled motors: The waste heat is transferred to the fluid via the motor housing. The motors can be used in immersed state and in non-immersed state for continuous duty (S1).

Furthermore the motors are equipped with thermal motor monitoring. This protects the motor windings against overheating. For units with single-phase AC motors this is built-in and switches automatically. I.e. if the motor is switched off due to overheating and then cools down it is automatically switched on again. Bimetallic strips are used for this as standard.

The connection cable has a length of 10 m as standard and is available in following versions:

  • With bare cable ends
  • With plug
  • With float switch and plug

Pump with vertical float switch

The "VA" version is equipped with a vertical float switch. In this version, the switching level is preset by two floaters sitting on a threaded rod. It uses less space than conventional float switches and is perfect for use in tight manholes.


There is a sealing chamber between the motor and hydraulics. This is filled with medicinal white oil. The unit is sealed on the fluid and on the motor side by mechanical seals.


General overview (Documents)

General overview 2021 International version

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

Certificate REACH (Documents)

REACH regulation

Edition 2020-08
Page format 209.9 x 297.0 mm
Number of pages 2
PDF (158 KB)
Product list
Number of results: 24
Product descriptionPressure portRated power P2Connection cable lengthMains connectionArticle number