Kärcher HDS 12/18-4 S Classic Hot Water Pressure Washer

The powerful HDS 12/18-4 S hot water high-pressure cleaner offers a high flow rate and optimised burner engineering for economical operation.

SKU: 1.071-923.0


The powerful Kärcher HDS 12/18-4 S Classic Hot Water Pressure Washer offers a high flow rate and optimised burner engineering for economical operation.

Kärcher HDS 12/18-4 S Classic Hot Water Pressure Washer : this entry machine in the Super class of Kärcher hot water high-pressure cleaners is characterised by a high water flow rate, meaning that it can even be operated with a second spray lance. The EASY!Force HD trigger gun uses the recoil force of the high-pressure jet, thereby reducing the holding force for the operator to zero. The high-pressure cleaner is intuitive to operate and transport, and thanks to the eco!efficiency mode, optimised burner engineering and precise cleaning agent dosing, it is also highly efficient and environmentally-friendly. The patented nozzle technology, 3-piston axial pump with ceramic pistons and the turbo blower, among other features, ensure an outstanding cleaning performance, while operational safety is guaranteed at all times by precise exhaust monitoring. The robust, corrosion-resistant chassis can also withstand tough applications easily and is simply and conveniently constructed. This allows easy access to all of the important components and ensures that operating data can always be retrieved easily.

High efficiency
In the eco!efficiency mode the machine operates in the most economical temperature range (60°C) – with full water flow.
The burner cycles are optimised to reduce fuel consumption by 20% compared to full-load operation.

The Soft Damping System (SDS) compensates for vibration and pressure peaks in the high-pressure system.
Large, easy-to-reach water fine filter for protecting the pump against dirt particles in the water.
Machine operational data (duration of use and required service intervals) can be retrieved.

Maximum efficiency
Proven and highly efficient burner technology.
Four-pole electric motor with three-piston axial pump.
Water-cooled motor for a high level of performance and durability.

Spacious storage compartment, e.g. for cleaning agents, gloves or tools.
Within easy reach for left-handed/right-handed operators and ideal for two-spray lance operation.

Detergent dosing
Precise dosing valve ensures low consumption.
Easy changeover between detergent tanks 1 and 2.
Rinsing takes place automatically in the 0 position.

Save time and effort: EASY!Force high-pressure gun and EASY!Lock quick-release couplings.
Effortless operation at last: the EASY!Force high-pressure gun.
EASY!Lock quick-release couplings: durable and robust. And five times faster than screws.

Technical data

Supply voltage (Ph/V/Hz) 3 / 400 / 50
Flow rate (l/h) 600 – 1200
Working pressure (bar/MPa) 30 – 180 / 3 – 18
Temperature (for supply 12 °C) (°C) min. 80 – max. 155
Consumption of heating oil or gas at full load (kg/h) 7.7
Consumption of heating oil in eco!efficiency mode (kg/h) 6.2
Connection load (kW) 8.4
Connection cable (m) 5
Fuel tank (l) 25
Weight (with accessories) (kg) 179.9
Weight incl. packaging (kg) 191.9
Dimensions (L x W x H) (mm) 1330 x 750 x 1060


  • Spray gun, EASY!Force Advanced
  • High-pressure hose, 10 m, Longlife m
  • Spray lance, 1050 mm mm
  • Power nozzle
  • Pressure switch-off
  • Option for the 2 spray lance operation
  • Soft Damping System (SDS)
  • Service electronics
  • 2 cleaning agent tanks
  • Dry-running protection