Wilo-DrainLift WS 40 Basic

Series description


Pump chamber made of plastic with integrated pump as concealed pumping station or floor-mounted lifting unit


Pumping of pre-cleaned sewage without faeces that cannot be returned to the sewer system using natural falls, and for the draining of objects that are below the backflow level.


Pump chamber complete ready for connection with pipework and pump.

Type key

Example:Wilo-DrainLift WS 40E/TC40 (3~)-BV
WSSynthetic pumps station
40Pressure outlet of the system
EE = single-pump system
D = double-pump system
TC 40Built-in pump
(3~)Three-phase motor
BVNon-return ball valve

Special features/product advantages

  • Pressure-tight sump for subterranean and aboveground installation
  • Flexible due to free selection of inlets
  • Large tank volume
  • Including pipework, level control, switchgear and pump


  • Pump chamber: PE
  • Pipework: 1.4404
  • Surface coupling: PUR
  • Non-return ball valve: Cast iron
  • Gate valve: bronze
  • Pump: Cast iron


The Wilo-DrainLift WS 40 Basic is an automatic lifting unit as a single-pump or double-pump system. The plastic shaft has integrated finning for increasing stiffness and anti-buoyancy, and also provides freely-definable inlets.

The system can be installed in buildings as a lifting unit, as well as outside buildings like a traditional pump chamber in the ground.

Technical data

  • Inlet: DN 100/DN 150
  • Ventilation: DN 70
  • Maximum pressure in the pressure pipe: 1.5 bar.


The submersible sewage pump Wilo-Drain TC 40 is preinstalled.

Scope of delivery

  • Tank (for single or double pump system)
  • Built-in pipework
  • Non-return ball valve
  • Including pump
  • Level switching
  • Switchgear (for three-phase pump or double-pump system)
  • Cover with seal (can be walked on, supporting a weight up to 200 kg)
  • Hole saw Ø 124 mm, inlet seal DN 100 (for pipe Ø 110 mm)
  • 1 PVC hose section Ø 50 mm with clamps for connection of a diaphragm hand pump
  • Fixation material for floor fixation
  • Installation and operating instructions


In the case of double-pump systems, the pressure line connection must be provided onsite.


  • Pump chamber extension
  • Pump chamber cover
  • Clamp boltings

Duty chart

Duty chart

According to EN 12056-4, flow velocity (in the pressure pipe) must be kept between 0.7 and 2.3 m/s.



Pump included in the scope of delivery

Single-pump system

Double-pump system


Floor-mounted installation

Concealed floor installation


Inlet position freely selectable

Level control: with float switch

Level control: with level sensor

Level control: with pneumatic pressure transducer




Installation drawings

Version example

e.g.: WS 40 E/TC 40...BV


General overview

Edition 2017
Page format A4
Number of pages 72

PDF (46 MB)


Wilo-DrainLift WS 40 Basic, WS 40-50

Article Number 2532145
Edition 1006
Version number 01
Page format A4
Number of pages 26

PDF (2 MB)



PDF: Wilo-DrainLift WS 40 Basic


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