Pressure Rating (PSI / Bar):
210 Bar (3,045 PSI) working pressure
240 Bar (3,480 PSI) maximum pressure
Flow Rate (L/min):
8.3 – 16.7 L/min (500 – 1000 L/h)
Power Type:
Electric, 3 Phase – 420V, 8 kW (50 Hz)
Water Temperature:
Hot water operation – minimum 80°C, maximum 155°C (inlet temperature 12°C)
Motor Brand and Type:
4-pole, water-cooled, low-speed electric motor
Pump Type:
Heavy-duty 3-piston axial pump with ceramic pistons
Included Accessories:
20 m Longlife high-pressure hose (DN 8, 400 Bar)
EASY!Force Advanced trigger gun
1050 mm rotating stainless steel lance
Power nozzle
Servo Control for precise pressure and water flow adjustment
Application Suitability:
Designed for demanding industrial and commercial cleaning tasks, this hot water pressure cleaner is well suited to construction sites, automotive workshops, agricultural use, transport fleets, and manufacturing environments. Built for consistent performance where reliability and cleaning power are critical.
Duty Cycle / Usage Class (Light, medium, or heavy-duty use):
Heavy-duty, suitable for continuous operation
Mounting / Portability:
Jogger-style mobility with large rubber-tyred wheels and swivel castors
Integrated push handles and tilting aid for stairs and kerbs
On-board storage for accessories, suction hose and power cable
Dedicated storage compartment for detergents, gloves and tools
Dimensions (L x W x H) (Millimetre):
1300 x 800 x 1140 mm
Weight (kg):
187.5 kg (with accessories)
197.3 kg (including packaging)
Safety Features:
Automatic pressure cut-off
Dry-running protection
Dual detergent tanks (20 L + 10 L) with external fill points
Stainless steel heating coil
Eco!efficiency mode for reduced fuel consumption
Integrated water filter for pump protection
SDS soft damping system to minimise vibration and pressure surges
Fuel and water safeguard system
Warranty & Service Support:
2-year manufacturer warranty
Additional 2-year warranty available with online registration
Supported by authorised service agents
The Kärcher HDS 10/21-4 M sits at the top end of Kärcher’s middle-class hot water range and is built for professional users who need dependable performance day in, day out. With a working pressure of 210 Bar and a flow rate of up to 1000 L/h, it delivers strong, consistent cleaning power for removing grease, oil, and heavy grime.
The combination of a water-cooled electric motor and a ceramic-piston pump ensures long service life and smooth operation, even under continuous use. Kärcher’s eco!efficiency mode helps reduce fuel usage without sacrificing cleaning performance, making it a practical choice for businesses focused on running costs.
Ease of use is a strong point, with ergonomic controls, practical on-board storage, and a well-balanced mobility design that makes the machine easy to manoeuvre around worksites. Durable, efficient, and built for real-world conditions, the HDS 10/21-4 M is a reliable option for commercial and industrial cleaning professionals.
Pressure Rating (PSI / Bar):
210 Bar (3,045 PSI) working pressure
240 Bar (3,480 PSI) maximum pressure
Flow Rate (L/min):
8.3 – 16.7 L/min (500 – 1000 L/h)
Power Type:
Electric, 3 Phase – 420V, 8 kW (50 Hz)
Water Temperature:
Hot water operation – minimum 80°C, maximum 155°C (inlet temperature 12°C)
Motor Brand and Type:
4-pole, water-cooled, low-speed electric motor
Pump Type:
Heavy-duty 3-piston axial pump with ceramic pistons
Included Accessories:
20 m Longlife high-pressure hose (DN 8, 400 Bar)
EASY!Force Advanced trigger gun
1050 mm rotating stainless steel lance
Power nozzle
Servo Control for precise pressure and water flow adjustment
Application Suitability:
Designed for demanding industrial and commercial cleaning tasks, this hot water pressure cleaner is well suited to construction sites, automotive workshops, agricultural use, transport fleets, and manufacturing environments. Built for consistent performance where reliability and cleaning power are critical.
Duty Cycle / Usage Class (Light, medium, or heavy-duty use):
Heavy-duty, suitable for continuous operation
Mounting / Portability:
Jogger-style mobility with large rubber-tyred wheels and swivel castors
Integrated push handles and tilting aid for stairs and kerbs
On-board storage for accessories, suction hose and power cable
Dedicated storage compartment for detergents, gloves and tools
Dimensions (L x W x H) (Millimetre):
1300 x 800 x 1140 mm
Weight (kg):
187.5 kg (with accessories)
197.3 kg (including packaging)
Safety Features:
Automatic pressure cut-off
Dry-running protection
Dual detergent tanks (20 L + 10 L) with external fill points
Stainless steel heating coil
Eco!efficiency mode for reduced fuel consumption
Integrated water filter for pump protection
SDS soft damping system to minimise vibration and pressure surges
Fuel and water safeguard system
Warranty & Service Support:
2-year manufacturer warranty
Additional 2-year warranty available with online registration
Supported by authorised service agents
The Kärcher HDS 10/21-4 M sits at the top end of Kärcher’s middle-class hot water range and is built for professional users who need dependable performance day in, day out. With a working pressure of 210 Bar and a flow rate of up to 1000 L/h, it delivers strong, consistent cleaning power for removing grease, oil, and heavy grime.
The combination of a water-cooled electric motor and a ceramic-piston pump ensures long service life and smooth operation, even under continuous use. Kärcher’s eco!efficiency mode helps reduce fuel usage without sacrificing cleaning performance, making it a practical choice for businesses focused on running costs.
Ease of use is a strong point, with ergonomic controls, practical on-board storage, and a well-balanced mobility design that makes the machine easy to manoeuvre around worksites. Durable, efficient, and built for real-world conditions, the HDS 10/21-4 M is a reliable option for commercial and industrial cleaning professionals.
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