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Choosing a waterpump | Kohler-SDMO


Choosing a waterpump

A waterpump is a completely autonomous pump (it does not require any electrical connection). It allows you to draw from any river, stream, etc. and evacuate fluids completely independently, using gasoline or diesel. To properly advise your customers, check the nature of the liquid, the lift height and the flow to determine the power required.

What type of liquid do I need to pump?


Because not all liquids to be pumped possess the same characteristics, KOHLER-SDMO waterpumps meet multiple applications according to:


Water quality:

  • Clean water or raw sewage: The AQUALINE INTENS range offers 2 versions depending on the quality of the water to be pumped:
    • The CLEAR 1.7 version is a small waterpump suitable for pumping clean water,
    • Versions ST 2.36 C5 and ST 3.60 C5, recommended for clean water, such as fish farming activities, pool transfers, etc.
    • Versions TR 2.36 C5 and TR 3.60 C5, specially designed for lightly soiled water, in particular for pumping muddy trenches, excavations, mud flats, etc.
  • Highly loaded and High Pressure water: AQUALINE SPECIALIST waterpumps are designed for 3 types of use:
    • HP 2.26 C5 effectively cleans floors, terraces, agricultural or construction machinery. It is also extremely valuable as a first response in the event of a fire.
    • Models XT 3.78 C5, TRASH 3 C5 and TRASH 4 C5 are designed for heavily loaded water, especially extreme and intensive uses and accept solid particles of 20 to 30 mm.


Output and pressure required according to pressure drops.

Choosing a waterpump



What lift height for my waterpump?

Lift height waterpump

The lift varies according to the configuration of the facility or the application (exhaustion, sprinkling, irrigation, emptying, washing). It is calculated using:


  • Suction lift: this is the height between the level of the pumped water and the pump shaft. For physical reasons, it cannot exceed 8 metres above sea level.
  • Discharge head: this is the height between the pump shaft and the highest point of the network.
  • Head loss: this is the resistance encountered by the water in the pipes. It is calculated according to the length, diameter and quality of the pipes, their shape and the number of accessories (we use 20% for general cases).

What power should I choose for my waterpump?

The output and discharge head are the main criteria when choosing your motor pump. It is important to calculate the required power by taking into account:

  • The output (determined by transferring the lift height in metres on the reference curve of the waterpump, expressed in l/min).
  • The lift height (divided by 10 to obtain a pressure in bar). If this pressure is insufficient, a more powerful model should be selected.