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Karcher HD 9/20-4 M High Pressure Washer


Mobile, unheated high-pressure cleaner with a 4-pole, low-speed three-phase motor and advanced equipment.


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The Karcher HD 9/20-4 M High Pressure Washer is a powerful, medium class pressure washer for heavy-duty cleaning tasks where 3-phase power supply is available. The machine features a 4-pole electric motor that runs at lower rpm than a 2-pole motor, providing more power and longevity. The machine offers water pressure of up to 200 bar and water flow rate of up to 900 litres per hour.


Technical data

Current type (Ph/V/Hz) 3 / 400 / 50
Flow rate (l/h) 460 – 900
Working pressure (bar/MPa) 40 – 200 / 4 – 20
Max. pressure (bar/MPa) 220 / 22
Connection load (kW) 7
Weight (kg) 54.2
Dimensions (L × W × H) (mm) 554 x 425 x 1000


  • Spray gun, EASY!Force
  • High-pressure hose, 10 m
  • Spray lance, 1050 mm
  • Triple nozzle (0°/25°/40°), Manual
  • Pressure cut-off
  • Servo Control

Features & Benefits


  • For accurate and variable cleaning agent dosing.
  • 2-way dosing valve for cleaning agent changeover.
  • Easy cleaning agent bottle changeover.

Powerful and durable

  • Air-water-cooled electric motors for intensive use.
  • 4-pole low-speed electric motor.

Clever features

  • Power cord storage at the rear of the unit.
  • Integrated lance holder for easy transport.
  • Parking position for short breaks.

Outstanding mobility

  • Large wheels for uneven surfaces.
  • Upright design for easy, ergonomic transport.
  • Integrated tilting aid at the rear.

Save energy and time: EASY!Force high-pressure guns and EASY!Lock quick-release locks.

  • At last – work without getting tired: the EASY!Force high-pressure gun.
  • EASY!Lock quick-release locks: durable and robust. And five times faster than screws.

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