Karcher Pressure Washer O Ring Kit

Stock Number: ES537803

Manufactured by Karcher

In Stock Available for immediate despatch

Rated 4.6 out of 5 (62 customers)

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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.

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Product Reviews

Rated 4.6 out of 5 (62 customers)
Write a review
  • Good products: right for the job

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

    By - Aberdeen

    Received this pack of replacement O rings nicely packaged and ready for use. My specific requirement was for a single O ring to repair a leak in the lance valve. A fiddly job to dismantle and re-assemble the lance but once the shut-off valve was exposed the single replacement seal was easilly fitted and the lance was returned to its normal working order. Good quality products and I'm sure that the remaining O rings in the pack will be of use in furtue - that's if I dont loose them in the meantime!
  • Contains everything needed

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

    By - Belfast

    Overall a good product which certainly did the job but could have been smaller
  • Did the job though not an exact match

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


    The trigger/lance of my K411A washer had developed a leak, which became quite bad. The lance design isn't one of the ones shown on the packaging, but three of the O rings were the size required. There are still few drips but it's much improved. I now realise that the leaking lance was causing a loss of pressure and the unloading valve not to malfunction, which in turn caused the on-off switch to burn out. I wish I had fixed the lance sooner. The other O rings in the package might come in useful in future.

Ask & Answer

(20 Questions and 19 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 Karcher K7.85 - pressure blows back into hosepipe when trigger is released 1 Answer

    The washer works fine until trigger is released, then at the moment the spray from the lance stops, the pressure blows back into the supply hosepipe. This has caused the "Tube water intake" to split, and also pop off the casting it connects to. Is there a faulty pressure relief valve, or supply one-way-valve or similar that could cause this ? If so, which parts should I look to replace? Thanks

    By Simon - Aberystwyth, Wales, UK - 14 July 2015

    • A
      We would have thought that a failure in the internal valves on the cylinder head would not be able to cause this problem and we would check the water supply pressure as it may be excessive. If you are sure you do not have excessive water pressure start by replacing the cylinder head.

      By Chris eSpares Staff - 15 July 2015

  • Q why does my k5-140 pump motor keep stopping and starting when i relise the lance trigger. 1 Answer

    By Howard Roberts - Sunderlans uk - 22 June 2015

    • A
      Any leak or damage to a seal in the high pressure area will cause the 'stop' pressure to escape and the motor will restart. Cure any leaks before replacing seals starting with the pump piston seals first.

      By Chris eSpares Staff - 22 June 2015

  • Q My Karcher is leaking at the handle to consrvatory roof cleaning lance joint. I noticed that the yellow rubber insert in the joint had come adrift, which I put it back in, but it still leaks. 1 Answer

    By Robert Cook - Orpington - 28 May 2015

    • A
      In order for us to answer your question or source the exact part you require please provide us with the following information: Appliance make, model and serial number of your appliance. For further help visit the "Finding Model Numbers" page on our website here: http://www.espares.co.uk/findingmodelnumbers. Alternatively please copy and paste this link into your web browser.

      By Chris eSpares Staff - 28 May 2015

  • Q karcher k2.20 leaking oil from underneath 1 Answer

    Any help would be great as to what part I would need to rectify this and also if it is easily fitted Thanks Jackie

    By Jackie - wisbech - 27 May 2015

    • A
      It will be necessary for you to dismantle and examine the pump assembly to identify where the oil is leaking from to be able to order the damaged part.

      By Chris eSpares Staff - 28 May 2015