The Karcher HDS 7/9-4 M medium class 110V hot water high-pressure cleaner with a host of user-friendly features.
Kärcher’s HDS middle class hot water high-pressure cleaners reach very high levels of performance, reliability and economy. With innovative features such as the eco!efficiency mode, offering fuel savings of up to 20% without compromising cleaning performance, 4-pole motors for high performance and long life, on-board diagnostics, and 3-year burner coil warranty, the HDS middle class range provides our customers with the toughness, cleaning power, and low running costs they demand. The Karcher HDS 7/9-4 M features a 4-pole, air-cooled 110V electric motor with long-life bearings and a 3-piston axial pump with ceramic pistons. With water flow of up to 700 litres per hour, and up to 90 bar pressure, the 7/9 is a great all-round machine with superb performance for daily and deep cleaning jobs where 110V power supply is required.
Features and benefits

Efficiency
In the Eco setting the unit operates in the most economical temperature range (60°C) with full water flow. Burner cycles are optimised to reduce fuel consumption by up to 20% compared to full-load operation.
Maximum efficiency
Highly efficient burner technology. 4-pole, slow-running electric motor guarantees a long working time.
Operational reliability
The large, integrated fine-mesh water filter reliably protects the high-pressure pump against dirt particles. An integrated exhaust gas thermostat switches off the drive motor if the exhaust gas temperature exceeds 300°C. The soft damping system (SDS) compensates for vibrations and pressure surges in the high-pressure system.Storage |
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Mobility concept |
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Save energy and time: EASY!Force high-pressure guns and EASY!Lock quick-release locks. |
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Specifications
Technical data
Current type (Ph/V/Hz) | 1 / 110 / 50 |
Flow rate (l/h) | 350 - 700 |
Operating pressure (bar/MPa) | 30 - 90 / 3 - 9 |
Max. temperature (°C) | 80 - 155 |
Power rating (kW) | 3.2 |
Consumption fuel oil (kg/h) | 4.6 |
Power cable (m) | 5 |
Fuel tank (l) | 25 |
Weight (kg) | 162.1 |
Dimensions (L x W x H) (mm) | 1330 x 750 x 1060 |
Equipment
- Trigger gun, EASY!Force Advanced
- High-pressure hose, 10 m
- Spray lance, 1050 mm
- Power nozzle
- Tanks for detergent, scale inhibitor and fuel can be filled from outside
- Control panel with indicator lamps
- Pressure switch control
- Electronic service control with LED display
- Two detergent tanks
- Dry running protection
Accessories
Thanks to automatic suction of the dirty water, the stainless steel FRV 30 Me Surface Cleaner makes surface cleaning more efficient in both inside and outside areas. Hot water cleaning up to 85°C.
For high-pressure cleaners with a flow rate of 350–600 l/h: new, robust and very high-quality foam cup lance with outstanding foam quality while consuming half as much cleaning agent.
DUO Advanced 1 cup foam lance with two-litre detergent tank and direct switching to high-pressure cleaning. Suitable for Kärcher pressure washers with a flow rate of 400 to 600 l/h.
Cleaning Agents
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