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Kärcher K4 Spec Review

The Kärcher K4 is an electric pressure washer offering a maximum water pressure of 1900 PSI and flow of 1.5 GPM. (Read full specs)

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Kärcher K4 1900PSI Electric Pressure WasherKärcher K4 1900PSI Electric Pressure Washer
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Description

Karcher’s 1900 PSI K4 pressure washer delivers exceptional cleaning power for most cleaning jobs. The patented induction motor is water cooled to increase life up to 5X. The Vario spray wand allows for quick adjustment between low and high pressure without the need to switch nozzles. For stubborn stains, the patented Dirtblaster® spray wand will clean up the toughest chores. Onboard detergent tank included. (source: Kärcher (opens in a new tab))

Zoom on the Kärcher K4

The Kärcher K4 is a light to medium duty pressure washer, that provides its users with an all-around versatile cleaning experience, and enables:

  • spot cleaning of hard, unpainted surfaces and high-reach cleaning
  • cleaning of painted or delicate surfaces
  • use of detergent and cleaning solutions

Its power characteristics and design, its main features and all its additional features are presented ahead.

Power

Powered by a 13 amp induction motor, its axial pump can deliver a pressure of 1900 PSI (around 32 times more than a standard garden hose) and a flow of up to 1.5 GPM (values claimed by the manufacturer). Combined, these values mean that the Kärcher K4 has a cleaning power of 2850 Cleaning Units.

Since it is an electric pressure washer, the motor of the K4 is started simply by an ON/OFF switch. The unit is ready-to-use with peace of mind, thanks to the included 35 ft GFCI cord.

Design & Handling

With its portable design and approximate dimensions of D12 x W15.6 x H34.3 in, the Kärcher K4 makes mobility one of its core strengths. The handle adds to the K4 convenience of transport.

Because the device weighs just 26.5 lbs, carrying it around is very easy. It is lightweight, partly thanks to its plastic frame. As if this lightweight wasn't enough, the device also features two wheels to further improve its ease of use and of transport.

Main Features

Along with the Kärcher K4 itself, the package also includes a spray gun, a wand, a pressure hose and a detergent injection feature, which are discussed in further detail below.

  • Soap injection: A safe detergent storage is facilitated by a removable tank. The unit features a dial to allow you to manually choose the detergent dilution ratio. Detergent is automatically dispensed when the VPS wand is in low pressure mode.
  • Pressure hose: A neat storage for the included 25 ft high-pressure hose is facilitated by a set of convenient hooks.
  • Spray gun and wand: Both the classic ergonomic spray gun and its VPS wand may be conveniently stored in a side hook. The Vario Power Spray (VPS) wand allows you to conveniently switch from low to high pressure, and everything between, while you clean. Simply twist the end for infinitely variable pressure adjustment.

Other Features

Some of the accessories of the Kärcher K4

Some of the included accessories

  • Safety: Safety of operation is enhanced by a trigger lock mechanism (which prevents accidental operation).
  • Accessories: On top of an owner's manual (opens in a new tab) and the usual documentation to get you swiftly started, the Kärcher K4 also comes with DirtBlaster turbo spray wand (which is especially useful on stubborn dirt), spray gun, detergent tank, wand, power cord and pressure hose.

The Kärcher K4's performance versus other pressure washers

The following charts are provided to give you an idea of how the key specs of the Kärcher K4 compare to similarly priced pressure washers.

  • The Karcher K4 and its 1900 PSI, ranks amongst electric pressure washers with a comparably low pressure output, considering the units that cost between $195 and $255. If the highest possible power of the water stream is your priority, one of the champions in this price range is the Sun Joe SPX4500 with 2500 PSI.
  • Considering the above-mentioned price range, this washer's maximum water flow of 1.5 GPM (gallons per minute) is higher than the average. If maximum rinsing efficiency is your top priority, one of the devices with the highest water flow in the same price range is the Sun Joe SPX4001, with a GPM of 1.76.
  • In comparison to other electric units of similar price, the 2850 Cleaning Units (PSI x GPM) of the K4 are average. When it comes to the highest overall cleaning power in the current price range, one of the products at the very top currently is the AR Blue Clean BC2N1HSS and its 3910 Cleaning Units.

Price comparison

As you can see from this interactive chart, when compared to other electric washers between 2500 and 3000 Cleaning Units, the Karcher K4 is on the average side of the price range.

Therefore, this pressure washer nicely fits in the expected budget for this kind of cleaning power.

The bottom line

STRENGTHS:
  • In the expected price range
  • Induction motor
  • Portable
  • Detergent dilution mechanism
  • High GPM for the price
AVERAGE SPECS:
  • Decent CU for the price
WEAKNESSES:
  • Low PSI for the price

Do you own the Kärcher K4 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
FuelElectric
HandlingPortable
WaterCold (104°F max.)
PSI1900
GPM1.5
Cleaning Units2850
Motor13 amp, induction
PumpN-COR Axial
Other model numbers1.603-152.0
Features
FramePlastic
Soap injectionYes
Soap tankRemovable
Soap dilutionAdjustable
NozzlesN/A
Quick connect nozzlesNo
Onboard storageYes
Hose25 ft
Hose storageHooks
Misc
Dimensions
(D x W x H)
Approx. 12 x 15.6 x 34.3 in
Weight26.5 lbs
Wheels2 wheels
Included accessoriesVPS wand, spray gun, high pressure hose, dirt blaster, detergent tank, 35 ft GFCI power cord
SecurityTrigger lock
Warranty1 year

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

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About Kärcher

Founded in 1935 by Alfred Kärcher, this family-owned business is headquartered in Winnenden, Germany. Credited with developing Europe's first hot water high-pressure washer in 1950, the company continues to pride itself on ingenuity and innovative thinking for new solutions in the cleaning industry. Kärcher also insists on being a socially- and ecologically-sustainable company. The popularity of the brand can be seen by the fact that the name Kärcher has in some European countries become a colloquial term used synonymously with pressure washers.

Warranty Information

The Kärcher K4 is covered under a warranty for up to 1 year. This warranty may be limited and may not cover all parts of the unit.
For more information about the warranty of Kärcher pressure washers, please contact the Kärcher Customer Support: 1-800-537-4129.

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