Karcher is a leading manufacturer of electric and gas pressures washers in the market. The pressure washers they produce range from 1500 PSI/1.25 GPM up to 4000 PSI/3.6 GPM which does not include their pressure washers meant for professional use. Karcher is a German based company that was established in 1950 by Alfred Karcher. The company has introduced about 21 electric pressure washers to choose from for your residential cleaning needs. Karcher K4 is one of the electric gas pressure models introduced by Karcher and it is enjoying the rating 4 stars out of 5 and has over 300 customer reviews in Amazon.

General features of Karcher K4

  • The model behaves as per their promise – Cleaner, Quicker.
  • Produces pressure up to 1900 PSI at 1.5 GPM of water flow
  • 25 foot high pressure hose
  • Vario Power spray wand that lets adjust spray from the wand itself
  • DirtBlaster spray wand that handles tough jobs in less time
  • N-COR pump that is durable, maintenance free and non-corrosive
  • Motor is cooled by surrounding water and prevents it from overheating thus increasing the life of the motor by up to 5 times
  • Has an onboard detergent tank
  • Fitted with high impact 7.7″ wheels
  • Covered by popular Rapid Exchange Program warranty


The unit being designed for high end performance with 1900 PSI and 1.5 GPM it is all set to meet the rigorous demands of residential cleaning. The unit runs for a longer time and life as it equipped with patented water cooled induction motor that does not overheat due to the surrounding water. This eventually reduces noise output and minimizes the energy consumption. The N-Cor pump is designed to last long, resist corrosion and go without maintenance.


K4 is capable of generating pressure up to 38 times as that of a standard garden hose and provides maximum cleaning power to handle any cleaning jobs around the house. The K4 is ideal for hard to do tasks like removing stubborn dirt, grim or mod and revealing a fresh look to all your surfaces. If you want to clean any fragile surfaces you can make use of the Vario Power spray wand to minimize the pressure in order to prevent damage. The onboard detergent tank is removable and can hold good amount of detergent. The dial on it allows you to control the amount of detergent you want to use for the cleaning job. This greatly helps in preventing wastage of detergent when involved in light duty cleaning job. The adjustable Vario Spray wand lets you vary the spraying patterns and pressure and disperses detergent when the pressure is low. To eliminate the stubborn stains, you can attach the DirtBlaster wand that is perfect to blast away the dirt settled on hard surfaces.

Supported by Rapid Exchange Program

The Rapid Exchange Program removes the hassles of standard repairs undertaken against any damage during the warranty period. Instead of repairing the parts the company offers quick free replacements. This model is supported by a two year warranty.

What are the pros of Karcher K4?

  • Water cooling system around the motor that prolongs the life by up to five times
  • Equipped with inbuilt detergent tank for easy soap application
  • Comes with two effective spray wands to handle majority of the household jobs
  • Minimizes the heat produced by pump and motor for an extended life
  • Noise from the motor is reduced up to 50% to work more efficiently

Karcher has wonderfully combines the customer feedback and their knowledge in the field of manufacturing pressure washers to come up highly innovative models of pressure washers. In the year of 2013, they alone filed about 500 patents on improving the technology. Apart, the company has lots of experience in engineering, research and development and they are capable of manufacturing at big scale unlike others in the same field.