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Description

What is a water handgun trigger used for?

The flow of water in a water gun or water pistol is controlled by a trigger. A stream of water is released when the trigger is pulled for cleaning tasks or water battles. The user can easily adjust the water spray's intensity and duration when the trigger is pulled.

When do you replace it?

The water handgun trigger needs to be replaced if it sustains damage, wears out, or stops working properly. Leaks, irregular water flow, and difficulty or incapacity in engaging the trigger are all indications that the part needs to be replaced. 

Is it a genuine spare part?

This spray handgun by Karcher is a genuine pressure washer replacement part.

Manufacturers Part Number:

  • 2.642-889.0

Alternative Part Numbers:

  1. 2.642-172.0
  2. 2.642-889.0
  3. 26421720
  4. 26428890
  5. 42889.0
  6. 42-889.0

EAN Number:

  • 4039784528352

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Safety note:

Warning: Always unplug any appliance from the electricity supply before carrying out any work or testing on it.

Latest Product Review(s)

4 Customer Review(s)

Fixed jamming lance

A problem had developed whereby the lance would jam in the handgun. I could not see how to fix it so I bought this replacement gun and it works perfectly - just like new. Very happy and much cheaper that the Full Service that Karcher had offered.

By Kevin Brown - Chichester
5th Mar 2022

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Value

Ease of Fitting

As good as new

My Karcher pressure washer is working 100% once again, now that I have the new pressure washer handgun / trigger part. Even better, the design of the new part has been improved, over the original version.

By Tom Jones - Wrexham
17th Jun 2020

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Value

Ease of Fitting

Frankenstien Karcher

I brought my Karcher 18 years ago without any tools or hoses in a sale. Within a month , I scavenged old parts to fit to the machine, and all worked well until 3 months ago. The handgun gave up as well as the lance. I tried different companies to try and find replacement parts, and repeatedly I was told no longer stock them as the machine was so old. I turned to the internet and found Ransoms, who were able to obtain all the parts I need, but also upgrading the machine to present day. My old machine has been given a heart transplant, it runs like new, thanks to Ransoms.

By David Cook - Seaford
1st Aug 2019

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Value

Ease of Fitting

Good price

Genuine Karcher trigger unit. No tools needed to fit it and cured a problem water leak, perfect.

By Brian Nicholls - Isle of wight
18th Dec 2017

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Quality

Value

Ease of Fitting

Questions And Answers

1 Answer(s)
Does the hose just push in to the handle to connect?
By Alison - Aylesbury - 14/09/2020
Hi Alison, that's correct. There may also be a clip to help hold this in. Please submit a part enquiry with the TYP number beginning 1. from the bottom of the pressure washer so we can confirm.
By Jordan - Staff Member
1 Answer(s)
Is this spray handgun compatible with Karcher 5.85m model where the part number is given number 4.775-500.0
By Nicholas - Glastonbury - 12/03/2021
Hi Nicholas, the new handgun for part 4.775-500.0 is RS508154.
By Jordan - Staff Member
1 Answer(s)
I have an old washer model B403 which works fine, but The hand gun has failed - probably due to all the O rings failing? However I would like to completely replace the hand gun. Will this spare part be compatible with this model and also the connections ( inlet and lance connection) to the original high pressure hose
By Steve - Minehead - 13/04/2021
Hi Steve, please submit a part enquiry including the TYP number from the bottom of the pressure washer beginning 1. so we can confirm the correct handgun.
By Jordan - Staff Member

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