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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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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
UPC886622019848

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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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.

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
  • application of detergent and cleaning solutions
  • intense cleaning of hard surfaces

The following sections will present you in detail its power characteristics and design, its main features and all the additional features it has to offer.

Power

The Kärcher K1800 in use

The Kärcher K1800

Powered by a 14 amp universal motor, its axial pump can deliver a pressure of 1800 PSI (around 30 times more than a standard garden hose) and a flow of up to 1.2 GPM (CETA-certified values). Combined, these values mean that the Kärcher K1800 has a cleaning power of 2160 Cleaning Units.

Kärcher made starting the motor of this electric pressure washer as easy as possible, since the K1800 gets easily started by stepping on an ON/OFF pedal. The unit is ready-to-use with peace of mind, thanks to the included 35 ft GFCI cord.

Design & Handling

With its hand truck design and approximate dimensions of D17.3 x W17.5 x H33 in, the Kärcher K1800 provides great mobility. The aluminum frame allows the device to remain highly durable, 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. To further improve its transportability and ease of use, the unit also features a set of two 8" wheels.

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 storage is ensured by 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. When a soap nozzle is connected, the detergent will be added automatically to the water.
  • Pressure hose: Using a set of convenient hooks, the included 25 ft high-pressure hose can be easily stored on the unit when it is not running.
  • Spray gun and wand: The included classic ergonomic spray gun and its wand can be easily stored in a front sheath.
  • 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 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 spray gun, wand, power cord 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.

  • With a maximum pressure output of 1800 PSI, the Karcher K1800 finds itself in the expected pressure range among electric units that cost between $120 and $150. If you're going after the highest possible power of the water stream, one of the best in this price range is the Stanley SHP2150 that can reach up to 2150 PSI.
  • This washer, with a GPM of 1.2 (gallons per minute) has a somewhat lower water flow value compared to devices in its price range. 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 SPX3000, with a GPM of 1.76.
  • As the K1800 has a total of 2160 Cleaning Units (PSI X GPM), it finds itself in the average cleaning efficiency range for similarly priced electric units. 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 Westinghouse ePX3050 and its 3572.8 Cleaning 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 cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget pressure washer.

The bottom line

STRENGTHS:
  • Inexpensive
  • ON/OFF pedal
  • Aluminum frame
  • Onboard storage
AVERAGE SPECS:
  • Decent PSI for the price
  • Decent CU for the price
WEAKNESSES:
  • Could include more nozzles
  • No detergent dilution mechanism
  • Low GPM 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.

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 consult Kärcher's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-800-537-4129.

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