The K 4 WCM Flex eco!Booster impresses with a powerful water-cooled motor, ensuring long lifetime. It is designed for occasional use on moderate dirt, for surfaces such as paths, garden furniture and cars. The included eco!Booster lance is ideal for delicate surfaces and, thanks to 50 percent increased cleaning performance*, it saves time and improves water and energy efficiency.

Use the dirtblaster lance to tackle the toughest grime when extra power is required, guaranteeing uncompromising results on stubborn dirt. Enjoy comfortable application thanks to the 8m PremiumFlex high-pressure hose and for long-term reliability, a built-in water filter protects the pump. All accessories store neatly onboard the device itself. For even more support use the Kärcher Home & Garden app, putting solutions for every task right in your hand.

• Save Water, Energy and Time – Gain 50% increased cleaning performance* thanks to the efficient yet powerful Eco!booster lance, perfect for use on sensitive surfaces such as wooden decks or cars. *Compared with the Kärcher standard flat jet
• Built To Last – You'll get years of use thanks to the state-of-the-art water cooled motor and 5 year guarantee, built for top performance and durability
• Everything In One Place – Keep everything you need close to hand with on-board storage for the lances, cable and hose
• Kärcher Always On Hand – To help you get the job done our specifically designed app is full of useful hints and tips. From setting up the machine to step by step application tips
• Get To Work Instantly – Get started with minimum effort. The Quick Connect system instantly links the high-pressure hose to the machine and trigger gun
• Clean With Freedom – The 8m PremiumFlex anti-twist hose eliminates troublesome kinks and twists for comfortable, unrestricted application

Delivery (UK mainland only)

 

Next Day: £5, or FREE over £40

- Order by 9pm Mon-Thu: next working day

- Order Fri to 5pm Sun: Monday

- Order after 5pm Sun: Tuesday

 

Pre-12pm: £10

- Same cut-offs as Next Day above

 

Saturday & Sunday: £10, or £5 over £40, or FREE over £75

- Saturday: order by 6pm Fri

- Sunday: order by 4pm Sat

 

Heavy items (over 30kg)

- Mon-Fri only. Order by 6pm and allow up to two working days

- Order after 6pm Thu: arrives after the weekend

 

Supplier items

- Sent directly by the supplier, so timings vary. Lead times appear on the product page in working days (Mon-Fri)

 

More about delivery 

Next Business Day Collection (eligible items)

- Order by 9pm Mon-Thu: collect next day

- Order after 9pm Thu to 5pm Sun: collect Monday

- Heavy items (over 30kg): allow up to two working days

 

Opening hours

- Weekdays vary by branch: open 6:30am-7am, close 6pm-8pm

- Saturday: 7am-6pm

- Sunday: 9am-4pm

 

Check your local store's hours and that it's open before visiting. Please wait for our text or email before collecting.

 

Holding your order
We'll hold it for 14 days, then automatically refund your original payment method.