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Kärcher K1800 Spec Review

The Kärcher K1800 is an electric pressure washer offering a maximum water pressure of 1800 PSI and flow of 1.2 GPM. (Read full specs)

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Kärcher K1800 1800PSI Electric Pressure Washer
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Description

The K1800 was developed to offer high cleaning performance and unparalleled ease of use. This electric pressure washer delivers 1800 PSI of TruPressure™, ensuring you get the highest level of cleaning power and driven by a reliable universal motor. It includes convenience features such as a unique on/off foot switch, a handy storage bin, large one-half gallon removable detergent tank and three spray nozzles (including a turbo nozzle for intense cleaning). It is perfect for tackling typical outdoor cleaning jobs. (source: Kärcher (opens in a new tab))

Zoom on the Kärcher K1800

In a nutshell, the Kärcher K1800 is a light duty pressure washer that allows:

  • intense cleaning of hard, unpainted surfaces
  • use of detergent and cleaning solutions

Ahead are presented its power characteristics and design, its main features and any other additional features.

Power

The Kärcher K1800 in use

The Kärcher K1800

Using a 14 amp universal motor, its axial pump delivers a pressure of up to 1800 PSI (roughly 30 times more than a standard garden hose) and a flow of up to 1.2 GPM (values claimed by the manufacturer). Together, the values result in a cleaning power of 2160 Cleaning Units.

Kärcher allows you to easily start this electric pressure washer, utilizing the K1800's ON/OFF pedal. The unit is ready-to-use with peace of mind, thanks to the included 35 ft GFCI cord.

Design & Handling

Thanks to its hand truck design and approximate dimensions of D17.3 x W17.5 x H33 in, the Kärcher K1800 offers great mobility. The aluminum frame ensures the device's durability, as it will not rust. The folding handle enhances its mobility, while allowing for a convenient storage.

The unit can be very easily carried around, as it weighs just 21.4 lbs. Its aluminum frame certainly plays a key role in this light weight. To further improve its transportability and ease of use, the unit also features a set of two 8" wheels.

Main Features

Along with the Kärcher K1800 itself, the package also includes a spray gun, a wand, a pressure hose, 3 nozzles and a detergent injection feature, which are discussed in further detail below.

  • Soap injection: Detergent is stored in a removable 0.5 gal tank. It must be noted that the Kärcher K1800 doesn’t come with a soap dilution mechanism. Therefore, you must always make sure that your detergent is correctly diluted. The detergent will be added automatically to the water when a soap nozzle is attached.
  • Pressure hose: The 25 ft high-pressure hose, which is included with the device, can be stored neatly on the unit itself when idle, using a set of convenient hooks.
  • Spray gun and wand: A front sheath enables you to easily store the included classic ergonomic spray gun and its wand.
  • Nozzles: The following table illustrates the 3 included nozzles, along with the surfaces which they are the most suitable for.
 

15°

Soap

Turbo
Concrete, brick, masonrySuitableSuitableUse with caution
Siding, gutters, houseUse with cautionSuitableNot recommended
Fencing, deck, patioUse with cautionSuitableNot recommended
Lawn equipment, boat, RVUse with cautionSuitableNot recommended

Note: The shape of the nozzles above is for illustration purposes only and may differ.
Red cross: Not recommended. Green check: Suitable. Orange check: Use with caution.

Other Features

The nozzles of the Kärcher K1800

The Kärcher K1800 nozzles

  • Onboard storage: The Kärcher K1800 allows you to be always fully prepared, as it features a handy storage area, where nozzles and accessories can be stored.
  • Safety: Safety of operation is enhanced by a trigger lock mechanism (which prevents accidental operation).
  • Accessories: Besides the usual owner's manual (opens in a new tab) and documentation to get you promptly started, the Kärcher K1800 comes with wand, power cord, spray gun and pressure hose.

Product Video

The Kärcher K1800's performance versus other pressure washers

The following charts are provided to give you an idea of how the key specs of the Kärcher K1800 compare to similarly priced pressure washers.

  • The Karcher K1800, which can achieve a PSI of up to 1800, falls behind the other electric pressure washers in the $150 to $180 price range. If your priority is the highest possible power of the water stream, in this price range, we suggest checking out the Realm BY02-BCMH, which reaches up to 2300 PSI.
  • The achievable water flow of this washer, which reaches 1.2 GPM (gallons per minute) can be described as low, compared to other devices in its price range. If being able to rinse away debris as efficiently as possible is your priority, one of the products with the highest GPM in this price range is the Sun Joe SPX2005P, with 1.8 GPM.
  • The K1800 has 2160 Cleaning Units (PSI x GPM), which can be considered low in comparison to other electric devices of this price. If you consider the highest overall cleaning power as a really important factor, the Realm BY02-BCMH and its 4025 Cleaning Units has one of the highest cleaning efficiency of all the similarly priced units.

Price comparison

As you can see from this interactive chart, when compared to other electric washers between 2000 and 2500 Cleaning Units, the Karcher K1800 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
  • ON/OFF pedal
  • Aluminum frame
  • Onboard storage
WEAKNESSES:
  • Could include more nozzles
  • No detergent dilution mechanism
  • Low PSI for the price
  • Low GPM for the price
  • Low CU for the price

Do you own the Kärcher K1800 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
FuelElectric
HandlingHand Truck
WaterCold (104°F max.)
PSI1800
GPM1.2
Cleaning Units2160
Motor14 amp, universal
PumpAxial
Other model numbers1.106-110.0
Features
FrameAluminum
Soap injectionYes
Soap tank0.5 gal, removable
Soap dilutionNo
Nozzles15°, Soap, Turbo
Quick connect nozzlesYes
Onboard storageYes
Hose25 ft
Hose storageHooks
Misc
Dimensions
(D x W x H)
Approx. 17.3 x 17.5 x 33 in
Weight21.4 lbs
Wheels2 wheels, ⌀8"
Included accessoriesWand, spray gun, high pressure hose, 35 ft GFCI power cord, 3 nozzles
SecurityTrigger lock
Warranty3 years

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 K1800 is covered under a warranty for up to 3 years. 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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