How to choose the right drainage pump for waste water?

Tips for choosing the right Japy drainage pump for waste water, for domestic, industrial, agricultural or other uses.

Apart from domestic use, Pompes Japy immersed pumps have numerous applications, particularly in the field of water sanitation, the agri-food industry, the agricultural industry and many other sectors that you can find here. Also, Japy pumps are used across the globe and in particular in developing countries.

When choosing a immersed drainage pump for waste water, you must first identify the type of water that will be pumped, size the equipment based on the volume of water to be discharged, taking into account the power, technical characteristics and length of the discharge pipe.

Do you need any advice?

Our team of experts is fully capable of helping you with this process.
To contact us, simply click on the following link:

Contact an expert

Identify the characteristics of the waste water to be pumped when using a Japy drainage pump

Waste water, also referred to as “liquid effluents”, is polluted water. According to the research of bioengineering professor Franck Rejsek, urban waste water (ERU - eaux résiduaires urbaines) is water laden with soluble or insoluble pollutants, mainly originating from human activity. It is generally “classified” as follows:

  • Domestic waste water,
  • Industrial waste water,
  • Agricultural waste water,
  • Rainwater and run-off water,
  • Other waste water.

For a simplified explanation of the various processes and technologies used in treating water, including a brief description of the main analyses used to ensure the quality of water and its treatability, please refer to the digital edition of the Memento Technique de l’eau for professionals in the field of water treatment.

Choosing the right size of your Japy drainage pump based on the technical characteristics: the guarantee of a long service life

Whatever your project may be, it is essential to properly identify the your pump's installation requirements. You will then be able to determine the appropriate characteristics of this pump. Depending on the Japy waste water drainage pump model selected, the power (0.37 kW, 1.5, 2.25 kW, etc.) and the Total Dynamic Head of the pump (TDH) may vary significantly (7 m, 16 m, 30 m, etc.).

In general, the following technical characteristics will help you choose the right size for your waste water drainage pump, depending on the volumes of your project:

  • Max. flow rate: the flow rate of water to be discharged, based on your project,
  • The height and length of the suction pipe,
  • The discharge head: the height, in metres, between the pump and its discharge point,
  • The diameter of the suction and discharge piping,
  • The nature of the liquid (particles, sand, sludge, grain size, density, viscosity, concentration, etc.)
  • The diameter (5 mm, 10 mm, etc.) of the particles to be sucked up (solids, organics, vegetal, etc.),
  • Voltage: an pump that is oversized, and therefore overloaded, risks overheating and breaking down,
  • Orifice: the size of the orifice (1"1/4, 2”, etc.) used to connect the hose to your installation,
  • The temperature of the pumped liquid: depending on the temperature of the liquid, the pump body or casing may have to be made of cast-iron, steel, stainless steel, etc.
  • The pump lining (carbon, silicon carbide, etc.),
  • The length of the cables for connecting your pump as well as the maximum permissible submersion depth for the selected pump.