Wilo-Padus UNI

Wilo-Padus UNI - Submersible drainage pump for intermittent operation for mobile wet well installation


Outstanding reliability thanks to corrosion-resistant hydraulic parts for universal use and different media
Easy installation thanks to low weight, built-in capacitor for single-phase motor and threaded flange
Optimal efficiency and high operational reliability due to optimized hydraulics
Quick servicing due to direct access to seal chamber and pump casing
Long maintenance intervals due to double mechanical seals and large seal chamber
Anti clogging due to integrated suction filter
Flexible pump for contaminated water for a variety of pumped liquids.
The Wilo-Padus UNI is the ideal pilot pump for pumping dirty water in small, industrial buildings. The pump is used as a portable or sump mounted pump. The hydraulic section in corrosion-resistant composite material offers high reliability for universal use in a wide range of operating environments. Installation is very easy due to the low weight, built-in condenser and threaded connection. Double mechanical seals and a large seal chamber ensure long maintenance intervals. Direct access to critical components ensures maximum ease of maintenance. In addition, Wilo-Control instruments also allow the Wilo-Padus UNI pump to be integrated into the existing building management system.


Submersible wastewater pump for mobile wet well installation


  • Pumping
  • Wastewater without feces (as per EN 12050-2)
  • Contaminated water
  • Pumped liquid with a pH-value > 4.5.
  • Material version "B": Aggressive pumped liquids, e.g. lake and sea water, condensate, distilled water


Winding temperature monitoring with bimetallic sensor
Ready for connection (version 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

Model overview


Product designation Article number
Padus UNI M05/M11-523/P 6084801
Padus UNI M05/M11-523/A 6084802
Padus UNI M05/M11-523/VA 6084803
Padus UNI M05/T11-540 6084804
Padus UNI M05/T11-540/A 6084805
Padus UNI M05/M15-523/P 6084806
Padus UNI M05/M15-523/A 6084807
Padus UNI M05/M15-523/VA 6084808
Padus UNI M05/T15-540 6084809
Padus UNI M05/T15-540/A 6084810
Padus UNI M05/T25-540 6084811
Padus UNI M05/T25-540/A 6084812
Padus UNI M05/T25-540 2"1/2 KIT 6084815
Padus UNI M05/T25-540/A 2"1/2 KIT 6084816
Padus UNI M05B/M11-523/A 6087664
Padus UNI M05B/T11-540 6087665
Padus UNI M05B/M15-523/A 6087666
Padus UNI M05B/T15-540 6087667
Padus UNI M05B/T25-540 6087669
Padus UNI-M05K/M11-523/A 6089421
Padus UNI-M05K/T11-540 6089422
Padus UNI-M05K/T25-540 6089423
Padus UNI-M05K/T15-540 6089424
Padus UNI-M05K/M15-523/A 6089425

Those. information

Explanation of the name

Example: Wilo-Padus UNI M05B/T15-540/A
Padus Submersible drainage pump with hydraulics for centrifugal pumps
UNI Series with copolymer hydraulics
M Open multi-blade impeller
05 Nominal diameter of pressure connection: G2
B Build
Build. without=standard
design B = motor housing in V4A
K = electric motor with cooling jacket
T Mains connection:
M = 1~
T = 3~
15 Value/10 = P2 motor power in kW
5 Frequency (5=50Hz, 6=60Hz)
40 Mains voltage
A Additional electrical equipment:
No additive = with cable with free end
P = with plug
A = with float switch and plug
VA = vertical float switch and plug

Technical Specifications

  • Mains connection: 1~230 V, 50 Hz or 3~400 V, 50 Hz
  • Operating mode in immersed state: S1
  • Non-submersible operating mode: S2-15 min; S3 10%
  • Operating mode immersed, K version: S1
  • Pressure connection: G2
  • Protection class: IP68
  • Insulation temperature class: F
  • Pumping temperature: Fully submersible: 3 - 40 °C, max. 60 °C for 3 min.
  • Free spherical clearance: 10 mm
  • Cable length: 10 m


  • Motor housing: 1.4301
  • Fluid body: PP-GF30 (copolymer)
  • Impeller: PP-GF30 (copolymer)
  • Static seal: NBR (nitrile rubber)
  • Seal at pump side: SiC/SiC
  • Motor side seal: C/Cr
  • Shaft end: Stainless steel 1.4401
  • In material version "B" all parts in contact with pumped liquid are made of stainless steel 1.4401 (AISI 316).


The submersible wastewater pump is constructed as submersible monobloc unit for portable wet well installation.


Outlet on the pressure side is designed as vertical threaded flange connection. Open multi-vane impeller is used. A suction filter is integrated into the hydraulic housing.

Electric motor

Surface-cooled or jacket-cooled motors in single-phase (with built-in operation capacitor) and three-phase version for direct starting are available:

Surface-cooled motors: The heat is given off directly to the environment via the motor housing. The motors can be operated in immersed state in continuous duty (S1) and in non-immersed state in intermittent duty (S2) or intermittent duty (S3).
Motors with cooling jacket: The heat is dissipated by the fluid being pumped through the motor housing. These motors can be used either immersed or non-immersed (S1) in continuous duty.
In addition, the motors are equipped with sensors for monitoring the temperature of the motor winding. They protect the motor winding from overheating. On units with a single-phase motor, they are integrated into the electrical circuit and operate automatically without an external device. That is, the electric motor is switched off when overheated and is automatically switched on again after cooling down. According to the standard, bimetal sensors are used for this purpose.

The standard supply cable is 10 m long and is available in the following versions:

  • With loose cable ends
  • With plug
  • With float switch and plug
  • Pump with vertical float switch

The VA version of the pump is equipped with a vertical float switch. The switching level is preset by means of two floats on the threaded rod. This version requires less space than conventional float switches and is suitable for use in narrow sumps.


There is a seal chamber between the electric motor and the hydraulics. It is filled with white medical Vaseline oil. The fluid-side and motor-side seals are provided by sliding mechanical seals.


Wilo-Padus UNI Download
Documentation Download



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