Submersible drainage pump

Type key

Example: Wilo-EMU KS 15 X
KS Drainage pump
15 Code number for distinguishing between pumps
X Versions
Possible versions:
E Single-phase connection
ES single-phase connection + float switch
D Three-phase current
DS three-phase current connection + float switch
DMS three-phase current connection + motor protection + float switch
E0 single-phase connection without plug (bare cable end)
D0 three-phase current connection without plug (bare cable end)
Grey cast iron Motor housing in cast iron
Ceram Unit with ceram coating
Ex Ex-rated
Z centre pressure port
H high-pressure impeller
M medium-pressure impeller
N low-pressure impeller


For pumping wastewater with foreign matter of max. Ø 45 mm (depending on the model), for

  • Excavation pits, basins and sumps
  • Flooded basement areas
  • Use in fountains

Special features/product advantages

  • Long service life
  • Heavy-duty design
  • Slurping operation possible
  • Suitable for continuous duty (S1)
  • Ready-to-plug

Technical data

  • Mains connection: 1~230  V, 50 Hz or 3~400 V, 50 Hz
  • Protection class: IP 68
  • Max. submersion depth: 12.5 m
  • Fluid temperature: 3…40 °C
  • Cable length: 10 m/20 m
  • Free ball passage: 5…45 mm (depending on type)
  • Pressure port: G 1¼, G 2, G 2½, G 3, G 4 (depending on type)


  • Ready-to-plug
  • Thermal motor monitoring
  • Sheath current cooling (depending on type)
  • Connection cable detachable


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


The outlet on the pressure side is designed as a horizontal or vertical threaded connection. On models with a horizontal pressure connection, a 90° elbow is attached to make a vertical outlet possible. Open channel impellers with free ball passage of 5…45 mm are used as the impellers.


Dry or self-cooling motors in single or three-phase versions are used, depending on the type. The self-cooling motors are filled with oil; the dry motors have thermal motor monitoring and sheath current cooling. The Ex-rated units KS 5, KS 6 and KS 16 are equipped with a dry motor without sheath current cooling. All models can be used both immersed and non-immersed, in continuous duty. This also permits slurping operation.

A sealing chamber protects the motor from fluid ingress. The filling fluid used is potentially biodegradable and environmentally safe.

The cable is detachable, the cable length is 10 m or 20 m. The S version is equipped with float switches. All models are equipped with plugs. The DMS versions are equipped with a switchgear with integrated motor protection.


Sealing on the fluid side and on the motor side is achieved by a bidirectional mechanical seal.


  • Motor housing: aluminium or EN-GJL 250 (depending on type and version)
  • Pump housing: EN-GJL 250
  • Impeller: EN-GJL 250
  • Shaft: 1.4021
  • Sealing on motor side: mechanical seal in various material versions
  • Sealing on pump side: Mechanical seal SiC/SiC
  • Static gaskets: FPM

Scope of delivery

Pump ready for connection with 10 m connecting cable (starting from KS 24, 20 m) and single-phase or three-phase current plug, Storz or GEKA solid coupling, 90° bend if necessary for implementation of vertical pressure outlet, installation and operating instructions.