LORENTZ pumps in the S1 range are designed for use with clean, non-corrosive water only. They are not certified for salt water or swimming pool water, or any liquids other than clean water. Use with other fluids is not covered by the warranty.

The water should not contain solids or long-fibered particles larger than sand grains.

Permissible content levels:

• Maximum sand content: 50 g/m³
  Higher levels will significantly reduce the pump’s lifespan due to wear.
• Maximum salt content: 300–500 ppm (at a maximum water temperature of 30 °C [86 °F]

Note: There are various units for measuring particle concentrations. For reference: 1 g/m³ = 1.0 ppm = 0.0001%