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Karcher Pressure Washer O Ring Kit Stock Number: ES537803

4.7 out of 5 4.7 out of 5 (86 Reviews)

Karcher Pressure Washer O Ring Kit - ES537803

4.7 out of 5 4.7 out of 5 (86 Reviews)

Keep your pressure washer hose and hand gun leak-free with these replacement seals

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Manufactured by Karcher

(This part fits select models)

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Pressure Washer O Ring Kit

If you are struggling to control the leak from your Karcher hose, trigger gun or other Karcher accessories, eSpares has just what you need. This Karcher replacement o-ring kit offers you the leak free experience.

This Karcher O ring kit contains 16 o rings and 4 yellow rubber stoppers. The O rings consist of 5 different sizes to make sure you will always be covered no matter the accessory, no matter the size. With the rubber stoppers you will be able to use your Karcher accessories without the fear of a leak again!

With the help of eSpares and this fantastic accessory, you can soon be on your way to cleaning the garden in no time!


  • 16 O-rings (across 5 sizes)
  • 4 yellow rubber stoppers

Genuine spare part for select models of Karcher pressure washers.

Please check the suitable model fit list to ensure that this is the correct part for your appliance.

Karcher spares reference: 2.640-729.0

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Here’s what other people are saying about Karcher Pressure Washer O Ring Kit.

(86 reviews)

4.7 out of 5

Ease of fitting 5 out of 5
Quality 5 out of 5
Value 4 out of 5
  • wiltshire
    5.0 out of 5

    yellow insert kit for karcher pressure washer

    excellent product saved me buying a new pressure washer fast delivery easy to install yellow inserts in my lance was missing rubber o ring but now it has proper o ring and new yellow insert my pressure washer is like new again

    Ease of fitting 5.0 out of 5
    Quality 5.0 out of 5
    Value 5.0 out of 5
  • Essex
    5.0 out of 5

    Perfect requirement

    Needed a new small washer to go on the pressure washer. This kit was ideal, only problem is I had to buy all the other washers which I dont need.

    Ease of fitting 5.0 out of 5
    Quality 5.0 out of 5
    Value 4.0 out of 5
  • Ireland
    5.0 out of 5

    The product exactly met my requirements . Perfect.

    The product exactly met my requirements. Perfect product perfect service.

    Ease of fitting 5.0 out of 5
    Quality 5.0 out of 5
    Value 5.0 out of 5
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Ask a Question

32 Questions and 32 Answers

By Colin Deazeley - Ayr - 03 November 2019
  • This is happening on my pressure washer too - I purchased it in August 2019 and have only used it 3-4 times. Now any tool I attach leaves they yellow plastic ‘O ring’ behind when I remove the tool By Steve S - UK - 08 February 2020
  • eSpares Staff from eSpares
    eSpares Staff at eSpares says...

    Have you checked for anything broken that might cause it to come out?

Answer this question
By S Brown - Lancashire - 06 June 2016
  • I replaced the capacitor - my machine just stopped working - water flowed through fine at low pressure but the pump stopped. New capacitor solved the problem By DLP - woking - 01 August 2016
  • Chris from eSpares
    Chris at eSpares says...

    For information on your repair see our video: How to Diagnose Pressure Washer Electrical Problems:

Answer this question
By crippin - Pontypool Torfaen - 08 January 2012
  • you may have a leaking O ring By Clive - Swansea - 06 June 2013
  • Hi Crippen sounds like you have a fracture in the control head as I did, this opens when the machine builds up presure and then releases it through the fracture, it is likely the fracture is under the metal head plate used to secure the unit head hence you cant see it, I know your post is long ago but this may help others as when I read the posts on the espares site it was no end of help to me. If the seals are ok on everything else I suggest replacing the control head housing. By Rob - N Ireland - 08 January 2013
Answer this question

When the vario power lance is attached to the handle and I pull the trigger water pours out of the handle. If I remove the lance there is no leak. I have changed the o ring on the lance where it connects to the handle and also the o ring where the hose connects to the handle but it still leaks. The pressure from the lance seems good and it does not appear to be blocked the motor sounds normal and is not pulsing -any ideas?

By Claire - SHEFFIELD - 26 September 2019
  • eSpares Staff from eSpares
    eSpares Staff at eSpares says...

    It is likely the O ring seal may be damaged so not making a watertight seal, check it and replace if required.

Answer this question
By Jon Reed - Keswick Cumbria - 19 October 2018
  • eSpares Staff from eSpares
    eSpares Staff at eSpares says...

    We have a video to help just copy and paste into your browser.

Answer this question
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