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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:

  • thorough cleaning of hard, paint-free surfaces
  • use of detergent and cleaning solutions

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

Power

The Kärcher K1800 in use

The Kärcher K1800

Its axial pump, which utilizes a 14 amp motor, may deliver a pressure of up to 1800 PSI (almost 30 times more than a standard garden hose) and a flow of up to 1.2 GPM. These values correspond to 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

The Kärcher K1800 offers superb mobility, with a hand truck design and approximate dimensions of D17.3 x W17.5 x H33 in. 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. It is lightweight, partly thanks to its aluminum frame. As if this lightweight wasn't enough, the device also features two 8" wheels to further improve its ease of use and of transport.

Main Features

The Kärcher K1800 comes with a spray gun, a wand, a pressure hose, 3 nozzles and a detergent injection feature, which are detailed below.

  • Soap injection: Detergent is stored in a removable 0.5 gal tank. As the Kärcher K1800 doesn’t include a soap dilution mechanism, the user must provide a correctly diluted detergent before proceeding to use it. If a soap nozzle is attached, the device will proceed to add the detergent to the water automatically.
  • Pressure hose: The included 25 ft high-pressure hose can be neatly stored on the unit when idle thanks to a set of convenient hooks.
  • Spray gun and wand: A front sheath allows for an easy storage of the included classic ergonomic spray gun and its wand.
  • Nozzles: The table below shows you the 3 included nozzles, as well as the surfaces they're the most appropriate 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's handy storage area lets you store nozzles and accessories, and thus, you’ll be always prepared and have everything necessary for the job at hand.
  • Safety: Safety of operation is enhanced by a trigger lock mechanism (which prevents accidental operation).
  • Accessories: The Kärcher K1800 comes with an owner's manual (opens in a new tab) and some basic documentation to get you quickly started. On top of that, you also get pressure hose, spray gun, power cord and wand.

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, a device which can produce up to 1800 PSI, is on the lower end of the pressure spectrum, among the electric pressure washers in the $150-180 price range. As for the device with the most powerful water stream, in this price range, one of the top products is the Realm BY02-BCMH with 2300 PSI.
  • When compared to devices in the above-mentioned price range, this washer and its 1.2 GPM (gallons per minute), is on the lower end of the achievable water flow. If rinsing away debris most efficiently is your priority, one of the devices with the highest GPM in this price range is the WEN PW21, which can reach up to 1.76 GPM.
  • The K1800 ranks as below average in terms of Cleaning Units, compared to electric devices in its price range, reaching only a value of 2160 CU (PSI x GPM). If you are after the highest overall cleaning power, the Realm BY02-BCMH with its 4025 Cleaning Units is one of the products that can achieve the highest cleaning efficiency in this price range.

Here's a list of the most popular specific comparisons:

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
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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