Karcher Pressure Washer O Ring Kit

Stock Number: ES537803

Manufactured by Karcher

In Stock Available for immediate despatch

Rated 4.6 out of 5 (68 customers)

Read all reviews Write a review

Main product image Enlarge icon enlarge image

Will this part fit my appliance? [?]

Click on your brand to check if this part fits your appliance

Karcher Pressure Washers


Pressure Washer O-Ring Kit

Keep your pressure washer hose and hand gun leak-free with these replacement seals. Each pack contains sixteen O-rings and four yellow rubber stoppers. The O Rings consist of 5 different sizes, to ensure all your needs are covered. You will soon be able to use your Karcher pressure washer without fear of a leak again 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.

More product images

Product Reviews

Rated 4.6 out of 5 (68 customers)
Write a review
  • Solves a problem

    • 4.0 out of 5
    • 4.0 out of 5
    • 5.0 out of 5
    • 2.0 out of 5

    By - U.k.

    This kit solves the problem of which o ring you need to fix your Karcher washer in my case a m520 Back pf packaging illustrates which ring fits where and covers the main leak places. Expensive for what it is and packaging not resealable but provides an easy and much cheaper solution than replacing
  • Service better than Karcher spares department

    • 4.0 out of 5
    • 5.0 out of 5
    • 5.0 out of 5
    • 5.0 out of 5

    By - Aberdeen

    Karcher could not help me identify the 'O' ring kit I required which I managed to find through Espares. Although Espares could not help me technically, I did manage to scroll through their spare parts list and eventually found what I was looking for. The kit arrived very quickly and was reasonably priced.
  • Complete kit.

    • 5.0 out of 5
    • 3.0 out of 5
    • 5.0 out of 5
    • 3.0 out of 5

    By - St.Leonards on sea. UK.

    I bought these because I need one O ring but didn't really know what size I needed. This kit covers everything so I now have loads of spares.

Ask & Answer

(25 Questions and 24 Answers) Ask a question
  • Q I have a K399 when I switch it on it surges until I press the trigger on the gun. 2 Answers

    By crippin - Pontypool Torfaen - 08 January 2012

    • A
      you may have a leaking O ring

      By Clive - Swansea - 06 June 2013

    • A
      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

  • Q Permanent Leaking To Chemical Discharge Bottle 1 Answer

    The Chemical Discharge bottle will continue to fill up without any power on and then stops as the pump uses the water with power. I reckon it is probably a valve maybe that feeds the clear plastic pipe. Can you advise please which part /valve requires replacing. Mine is a K6.50Mb unit.

    By Mike - Manchester - 09 March 2016

    • A
      The problem is likely to be caused by Stock Number: ES1751853 leaking.

      By Chris eSpares Staff - 14 March 2016

  • Q Karcher 2.94 m Pressure Washer Leaking 1 Answer

    Hi, I asked a question on here about 3 or 4 months ago, as having not used my pressure washer for some months it had started leaking. It made a rattling noise when I moved it. It was suggested the fault might be the O Rings. I have a Karcher extension hose between the front of the unit and the pressure gun. That has seized onto the pressure washer, and however hard i try i cannot shift it. As a result I hadn't got round to stripping the washer. Today I finally got round to trying to sort it. Two issues: 1. I cannot shift the hose from the washer. Any tricks to loosen this please (I have tried squirting GT40 in there, but it is not loosening); and 2. I opened the back off the machine. The noise is two screws about 9mm long and heads about 16-17mm wide rattling around inside. The motor and internal bits are not attached to the case in any way. Any idea where these screws are from, and is the motor supposed to be attached to the case. Do you still thing this is the O-Rings? Thanks for your help, Stuart

    By Stuart - Harrogate - 06 February 2016

    • A
      The motor appears to be clamped by the upper and lower cases and doesn't appear to have any fixing screws. To remove the hose try heating with a hair dryer to expand and soften the hose screw fixing.

      By Chris eSpares Staff - 08 February 2016

  • Q leaking k2 only when in operation 1 Answer

    I have a k2 411A washer which leaks and pulses only when the trigger is operated. 1) is it worth fixing? 2)where can I get the parts in the u.k? details are also... NR. 189164 K2 (1.994-972) 441198 19949720189164 I hope you can help Thanks Ashley

    By Ashley - Somerset U.K. - 07 December 2015

    • A
      The pulsing is due to the leak allowing the pressure to escape. Disconnect and remove the case then just connect the water to the unit to identify where the leak is occurring. We can supply the parts once identified.

      By Chris eSpares Staff - 08 December 2015

  • Q Why does my k297ml loseing pressure 1 Answer

    By Joseph - Long island u s a - 16 November 2015

    • A
      If there is always low pressure and no leaks the problem is likely to be worn seals or a stuck valve.

      By Chris eSpares Staff - 17 November 2015