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Karcher K4 Compact UM Cold Water Pressure Water - 420 L/h - 130 bar

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ID: K606655

EAN: 4054278796185

MPN: 1.679-400.0

Karcher K4 Compact UM Cold Water Pressure Water - 420 L/h - 130 bar
Rotating brushRotating brush
Fixed brushFixed brush
Water filterWater filter
Free water supply connection kitFree water supply connection kit
Axial pump
Pump head material
N-Cor (plastic)
Max. flow rate per hour
420 L/h
Max. pressure
130 bar
With water
Operating mode
Single-phase 230 V
Rotating nozzle
On the second lance
Self-priming pump
4.7 Kg
Manufacturing country
Product Features
K4 Compact UM
Operating mode:
Single-phase 230 V
Operation mode:
Cold water
Manufacturing country:
Motor data
Motor type:
Electric single-phase
Motor speed:
2800 RPM
Max. power absorption:
1.8 Kw
With water
Power supply:
220 V electric
Pump data
Pump brand:
Pump type:
3 axial cylinders
Axial pump:
Self-priming pump:
No. of pump speeds:
Pump head material:
N-Cor (plastic)
Plastic pump head:
Flow rate:
6.3 L/min
Max flow rate per minute:
7 L/min
Max. flow rate per hour:
420 L/h
Operating pressure:
110 bar
Max. pressure:
130 bar
Extractable handle:
External detergent suction hose:
On wheeled frame (with wheels and handles):
Tool holder:
Power cable holder:
Free gifts/extra features
Spray gun:
Rotating nozzle:
On the second lance
Hose length:
6 m
Instructions manual:
Dimensions and logistics
Product dimensions in cm (L x W x H):
50 x 30 x 35 cm
Net weight:
4.7 Kg
Original packaging
Original packaging/s dimensions in cm (L x W x H):
55.1 x 39 x 35.9 cm
Gross weight (packaging included) :
6 Kg
Assembly time:
5 minutes
Prompt Delivery
22 items in stock
Free Shipping
Estimated delivery: 23/05/2024 - 27/05/2024
€ 251,69
VAT Included

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Karcher K4 Compact UM Pressure Washer

The K4 Compact UM cold water pressure washer is a very practical and high-performing product.

It is renowned to be very comfortable, thanks to its small size it is ideal to be transported (also thanks to its extremely low weight, the removable handle, with telescopic handle and the plastic wheels) or to be stored in very confined spaces.

The working area is 30 s.q. m./h, making the machine ideal for cleaning vehicles, garden furniture, fences, shutters, patios and balconies.

The water-cooled motor stands out for its long service life and high power, thus ensuring excellent performance.

This pressure washer has an integrated water filter on the side of the machine, next to the 3/4" garden hose connection.

Free items included:

  • High Pressure Gun G 180 Q
  • Vario-power lance
  • Rotating nozzle
  • WB 150 brush
  • High pressure hose: 6 m

Pump and Motor

Pressure: Max 130 bar

Operating pressure: 110 bar

Max flow rate: 7 L/min (420 L/h)

Operating flow rate: 5.2 L/min (312 L/h)

Water-cooled motor, WCM induction motor

Unlike all other pressure washers on the market, those of Kärcher brand have an innovative cooling system for the motor's water (compared to traditional fan). Indeed, the water, before reaching the hose circulates around the electric motor let it constantly cool. This Water cooler system is an exclusive of Kärcher machines and is not present on any other cleaner on the market

The pump is made of the innovative N-Cor material:

  • Anti-corrosion
  • Detergent resistant
  • Lightweight
  • Silent
  • Innovative

N-Cor is an innovative type of polyfiber material that prevents corrosion even after continuous contact with water.

This material is also lighter than normal steel.

The pressure represents a fundamental data while dealing with this category of machinery. An additional and more important technical specification is represented by the flow rate: the cheapest items may often feature a high pressure, but a very short flow rate resulting in inefficient units. The minimum flow rate must be at least 350 L/H.

Water-cooled motor

High-pressure gun and lance

Lance and gun:

  • G 160 Q gun: the new G 180 Q gun with Quick Connect is 13 cm longer and is now even more
    comfortable to use and more ergonomic when cleaning with Kärcher high-pressure cleaners. Quick coupling.
  • Vario Power 180 lance: switchable from low-pressure detergent jet to high-pressure jet by simply rotating the lance.
  • Dirt-eating lance with rotating nozzle DB180: for stubborn dirt such as that on surfaces covered with moss or weathering

Additional features

Starter with User-friendly push button controls

Quick Connect system for hose quick connection to the machine.

Spray gun holding

Rear tool holder

The machine also features a detergent suction function by means of the removable external hose. (Detergent sold separately)

Telescopic handle for easy transport

Water connection to the mains supply with integrated fine filter

Comfortable wheels for easy transport

Free items & Standard equipment


WATER CONNECTION KIT for pressure washer

The kit includes:

  • Ø 15 mm yellow hose, 15 m long
  • Male quick connector for tap connection (size of the standard thread: 3/4“)
  • Standard female quick connector (to insert the hose into the male quick connector for tap connection)
  • Female quick connector with WATERSTOP (to be applied to the end of the hose for connection to the high-pressure cleaner). Waterstop system: when the pressure washer, or another device is disconnected, the water flow stops automatically; when the pressure washer is re-connected, the water starts to flow again. This allows to avoid using the tap every time you disconnect the female connector from the pressure washer and every time you change the accessories.

  • Adjustable plastic lance with male quick connector.

    It is possible to connect it to the hose to use it for any job when you are not using the pressure washer. Also suitable for irrigation. It is equipped with adjustable nozzle (direct or cone).

    Also useful to rinse a surface before spreading the detergent to subsequently wash it with a pressure washer.

Fittings and hose connection diagram of this accessory on request (water connection kit)

COMPLIMENTARY: Brushes + Filter Kit

Thanks to the adaptors available, the brush + water filter kit for cold water pressure washers is compatible with pressure washers of the following brands:


Annovi & Reverberi – Black&Decker – Bosch – Stanley

Comet - Interpump - Kranzle


The set includes:

Rotating brush
Suitable for "aggressive” wash on the surface. In fact, thanks to its rotary motion, it allows the bristles to remove even the most difficult dirt by friction.

Fixed brush
Recommended for cleaning more delicate surfaces, as the operator has full control of the pressure and friction exerted by the brush. It is therefore recommended to clean vehicles and delicate surfaces.

Water filter
Insert it on the inlet of the high-pressure hose of the pressure washer, it protects the machine from any impurities from the water system that could damage the pumping unit. Thanks to the transparent material, you can check at all times the condition and cleanliness of the filter. The filter has a female connection Ø 1" inch on the pressure washer side and a male connection Ø 3/8" inch on the hose side.

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WARNING: this accessory is designed exclusively for cold water.

Free items included

This pressure washer is shipped in its original packaging.

  • Rotating nozzle lance : Point like rotating jet for cleaning different types of surface.
  • High pressure gun with adjustable nozzle.
  • 6 m High pressure hose and 3/4” garden hose fitting.
  • Vario Power lance with infinitely variable pressure control by rotating the lance.
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