Karcher Pressure Washers - Useful Information

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  1. Karcher Pressure Washers - Useful Information 
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    The key to pressure washer performance is a combination of pressure (bars) and flow rate (litres per hour). Imagine the fireman's hose - literally thousands and thousands of litres of water per hour but at 3 or 4 bar. You need good pressure - 120 - 140 bar and a decent flow rate - 350 - 500 litres. For the old school a bar is equivalent to 14.7 psi. Note that there is a difference to maximum pressure and rated pressure. Make sure when comparing fruit it is apples with apples.

    Karcher pressure washers are sold in series - much the same as BMWs. They start at 2 series, denoted by K2*** (stars being model numbers, ie K2300, K2385, K2400, etc) through to 7 series, denoted by K7***. There is an 8 series but this is a hot water machine and not widely available in the UK.

    The K2*** machines are opening price point and cover light duty work. For the serious car owner, with drive way, garden, patio etc, the K3 or K4 should be ample. There are a number of K3*** models out there, most are actually made in Italy rather than Germany - Karcher own a couple of factories there. There is also one K3* sold through Screwfix - made in China.

    Look out for the "X design" - the latest range available for K3*** through to K5***, i.e. K3500X. These have water cooled motors are are therefore quieter to use.

    B&Q have the only K6*** on the market, the K6.160, and these are on sell through right now. You can get the only K7*** from Makro if you have a trade card - K7280. This has a brass cylinder head so should last for ever.

    Also conside the length of high pressure hose that comes with them. 4 metres for the K2 makes them cheap but means having to continally move the machine as you wash the car. At the top end you are looking at 9 - 12 metres!!!

    The higher you go in the range the more cleaning applications are open to you. Look out for detergent handling capabilty, starts with a little tube that "sucks" detergent through, mixes with water and is applied at low pressure, either through the lance or brush. Higher specced machines will have on board detergent tanks - maybe even twin tanks.

    Any questions, hehehe
     
     

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    Work in Banbury by any chance Chris?
    2013, Porsche 911 Carrera 4S, PDK, Sports Exhaust, Chrono, etc, etc

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    Quote Originally Posted by mark@vorny.co.uk View Post
    Work in Banbury by any chance Chris?
    For the last 14 years. Hey if you guys want to share my knowledge why not.
     
     

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    Quote Originally Posted by Cashmere_Chris View Post
    For the last 14 years. Hey if you guys want to share my knowledge why not.
    Good on you for coming on and explaining all

    It's a minefield for the newbie so the details you listed are most welcome. Have to say, when your parts department was open to public calls, the customer service was great
    2013, Porsche 911 Carrera 4S, PDK, Sports Exhaust, Chrono, etc, etc

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    You can always be sure of a very competively priced offer from the outlet store.

    Click here.

    Where all end of lines and refurbished machines are sold, tested and guaranteed.
     
     

  8. Karcher Pressure Washers - Useful Information 
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    The first one on that link with the patio cleaner is on offer in tesco reduced from £199 to £97, is that model any good? K3.540 I think it is
     
     

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    I didn't think Tesco did the K3540 - B&Q certainly do.

    It is a good medium class machine, part of the new X series with induction motor.
     
     

  10. Karcher Pressure Washers - Useful Information 
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    It might not be that one it looks exactly the same though with the patio cleaner attachment, I was looking at buying one, but don't know much about pressure washers
     
     

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    I need a decent one to clean the car with. What would you recommend?


    BMW 2003 320d Sport
     
     

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    Nice info, thanks.

    Anything about pressure washers and PDC? I hear you can kill your PDC sensors with a pressure washer?!?

    2 of mine are gone and I kinda blame the pressure washer.

    What do you reckon in you expertise?

    thanks.
     
     

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