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      02-26-2017, 07:53 AM   #1
Stahliniho
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Descaling a Pressure Washer?

As title suggests...

Any members got any tricks on descaling a pressure washer?

Split the pump to find it full of limescale...

I've heard vinegar is good?



Model is a Comet KS1600.
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      02-26-2017, 08:19 AM   #2
IanS100
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Can you buy new seals and O rings for it?
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      02-26-2017, 08:25 AM   #3
Stahliniho
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Quote:
Originally Posted by IanS100 View Post
Can you buy new seals and O rings for it?
Yes, I know the UK distributor for them, says he can get me a full service kit.

called him first to see before I split it.
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      02-26-2017, 09:03 AM   #4
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I've used white vinegar on a shower head. A soak overnight should clean it up nicely.
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      02-26-2017, 10:34 AM   #5
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Quote:
Originally Posted by Thermobaric View Post
I've used white vinegar on a shower head. A soak overnight should clean it up nicely.
OK, I'll try it... thank you
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      02-28-2017, 06:46 AM   #6
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I use vinegar all the time for the kettle and shower. 50p a litre usually from the shop. Leave it overnight as said before. Far simpler and cheaper than scale removers.
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      03-01-2017, 02:42 AM   #7
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left in over 2 days, to no avail !

Still white/crusty in the main pump... Although a lot less, was thinking wire wool?

Its only cast aluminium, so its not like I need a good finish?

OR autosol?
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      03-01-2017, 03:57 AM   #8
Chappers 71
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Have you tried viakal?
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      03-01-2017, 04:59 AM   #9
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Quote:
Originally Posted by Chappers 71 View Post
Have you tried viakal?
Yes Chappers 71 never touched it... might try it again as that was before the soak in vinegar.
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      03-03-2017, 05:30 AM   #10
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White and crusty sounds like aluminium oxide.
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      03-03-2017, 06:11 AM   #11
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Quote:
Originally Posted by John320d View Post
White and crusty sounds like aluminium oxide.
John320d Thats what I had considered, but there's been no salt exposure unlike an outboard leg or alloy wheel on the road?

Thought about wheel cleaner too, but it seems to be right rough on cast aluminium.

I'll post a picture of what its like now after the clean when I get home.
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      03-06-2017, 03:09 AM   #12
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Quote:
Originally Posted by Stahliniho View Post
John320d I'll post a picture of what its like now after the clean when I get home.
Are you still on your way home?
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      03-06-2017, 03:17 AM   #13
Stahliniho
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HAHA... I kid you not, I was just updating this to say that I've not got a chance for pics as I've been too busy trying to descale the bloody thing haha.

So far I've tried -

White Vinegar Bath over 48 hours
Viakal
Wire Brush (had some effect)
Descaling powder from B&Q (I suspect this was just bicarb soda)
Bicarb of Soda 24 hour soak
Tooth Paste
Wet & Dry sandpaper (good for flat surfaces and does show pitting)
Scraping with Flat head Screwdriver (most effective thing I've done but only very good when dry)

I'm now considering a dremel sized wirebrush or grinding stone as it just takes ages with the scraping.

@john320d I think you're right with the oxide.
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      03-07-2017, 03:29 AM   #14
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So here it is...







You can see where I've been scraping and where the face is pitted !

Think this is the best I can get it to. Got all the seal/o ring/oil from the distributors through so just need to rebuild it and go from there...
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      03-08-2017, 02:51 AM   #15
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Used this stuff last night

http://www.kilrock.co.uk/productDeta...ategoryID=1858

Seemed to fizz and pop and take some of the stuff off, but its massively better than before I started so its time to rebuild!

Cheers for the help!
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