Karcher Pressure Washer Outlet Connection Cover

Stock Number: ES538457

Manufactured by Karcher

In Stock Available for immediate despatch

Rated 4.8 out of 5 (307 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 Outlet Connection Cover

Have you got a leaky pressure washer? The usual suspect is one of the elbow connections, especially if your water pressure is also poor. Due to bad weather or lack of use these connectors can split over time. Replace it to help stop leaks and get cleaning with full power again. 

Please note: Does not include the o-ring seal, which can be purchased separately here.

Genuine spare part for select models of Karcher pressure washers.

Please check the list of suitable models using your model number to ensure that this spare part will fit your appliance.

How to replace Karcher inlet and outlet connectors

This video should help with fitting this part. However, the exact layout and fitting technique may differ for your make and model.

Be safe - always unplug any appliance from the electricity supply before carrying out any work on it.
If you are in any doubt contact a qualified repairer.

More product images

Product Reviews

Rated 4.8 out of 5 (307 customers)
Write a review
  • simple fix

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


    Simple part at good price, saved a new pressure washer
  • Easy If You Have The Tools

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

    By - Nr Bristol

    The replacement of this item is simple, just pill the silver tab out and pull off. Getting to this item will require a long reach star drive bit and at least 3 drill screwdriver adapters, to get the reach. There are 2 screws to take off the handle, then slide to rear, 2 to take the top cover off these are posy drives. Remove additive tank by just pulling firmly away from body. Then it's just the 8 star drives to remove and then the cover comes away.
  • Saved throwing away the pressure washer.

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

    By - Gleaston, Cumbria.

    The information given on the site pointed me to the right spare part, it was easy to fit and saved me buying a new pressure washer.

Ask & Answer

(17 Questions and 20 Answers) Ask a question
  • Q still have leak in replaced outlet connection 3 Answers

    model 4.99 new out elbow fitted. leaking at point where elbow meets outlet pump. Ordered o ring for it. I have fitted it over the screw fit on the outlet pump. now cannot fit new elbow to pump. cannot insert metwl clamp. Any ideas? Am I puting the o ring in the correct place? Any help appreciated Bob

    By wyrmbk - 06 May 2010

    • A
      As stated above you need a small O ring which doesn't come with espares part (although espares claim it comes woth all seals). I found that when I connected up to the low pressure hose the outlet connection leaked slightly so I wasn't hopeful. However when I switched on the pump the leak got worse for a second then it stopped suddenly - I assume the pressure seated the O ring properly. The sealing method is quite confusing - the outlet connection has an internal tube with an external O ring which looks like it should seal to the inner surface of the pump outlet. However it as actually much too small to do this - presumably it's for use with a different model. Incidently the pressure hose will seal directly to the pump outlet (without using the elbow) and it seals using this type of external O ring. It seems Karchner use some universal parts that seal in different ways on different models.

      By DavidB - 26 April 2011

    • A
      Hi Bob, You need the small 'O' ring which is about the same size as the one on a male garden hose connector. It just sits on the inner pipe. The screw fitting is not actually used with this connector and (I think) was or is for a different machine using the same pump. The big orange DIY store does a pack of 'O' rings in the plumbing section for about £1.99. The one you need is in there - so is the larger one for the Inlet (clear plastic) pipe. That one sits in a groove and is easy to see! Best of luck, CJ

      By CockneyJock - Trowbridge, Wiltshire - 08 June 2010

    • A
      The O ring fits inside the female connection of the pump so that it buts up to the elbow outlet fitting.

      By slopekeys - penkridge - 01 June 2010

  • Q O-ring needed or not ??? 2 Answers

    After replacing this part, anytime I hook up the pressure hose, the pressure forces water out through the other end i.e. metal c-clip end (washer is still off). Is there a seal/o-ring that I am missing at this end ?

    By DUGG - Ireland - 22 March 2010

    • A
      Nearly made the same mistake. Inside there is a small rubber O ring, luckily I saw it when it fell out but could easily have missed it.

      By wheltonpat - Alicante, Spain - 12 May 2010

    • A
      Yes. It is a standard size, Though I cannot remeber the actual size.

      By senna1 - Leeds - 10 May 2010

  • Q The joint between my conservatory roof extension tube and the lance is leaking; I think it is a problem with the yellow stopper located in the extension. Can you tell me how to remove the old stopper. 1 Answer

    By Robert Cook - Orpington Kent - 29 December 2015

    • A
      Looking at the yellow connectors on Stock Number: ES537803 they look as if they simply rotate 45 degrees to allow the bayonet fitting to release and remove them.

      By Chris eSpares Staff - 29 December 2015

  • Q Is this easiest way to solve worn thread problem? 1 Answer

    By JD - Anglesey - 28 August 2015

    • A
      If the thread on this connector is damaged replacing this as shown in the video should resolve the problem.

      By Chris eSpares Staff - 01 September 2015

  • Q Can I use a 5.2m telescopic lance with this model KB 4040 1 Answer

    I want to clean my roof tiles.

    By Tom - Newcastle upon tyne - 01 June 2015

    • A
      Although you may be able to connect a telescopic extension you would not be able to control the sideways movement at the gun caused by the discharge of the high pressure water.

      By Chris eSpares Staff - 01 June 2015