If you are choosing between a K5 and a K7, buy the K5 Power Control Flex. Same gun family, same Vario, same Plug ‘n’ Clean bottle. The K7 adds 180 bar and a bit more water. That is a large-plot upgrade, not a better car wash and not a nicer normal UK drive.
If you click through and buy, we may earn a commission.
The K7 is a class, not one Flex carton we can lock. Official boxes sit from about £410 to £520. If you already know you want 180 bar, shop the live carton. If you are unsure, stop at the K5. The step below this page is K4 vs K5. The rest of the yellow range sits on the Kärcher hub.
Quick picks
The one to buy
K5 Power Control Flex
£339.99
145 bar, 500 L/h, 10 m Flex hose. The Kärcher most UK drives should stop at.
Best if you do not need either
K4 Power Control Flex
£169
130 bar, 420 L/h, 8 m Flex hose. Enough for cars and a normal patio. Read K4 vs K5 before you stretch to a K5.
The gap is plot size
| K5 Power Control Flex | K7 class | |
|---|---|---|
| Typical UK boxes | Bare Flex 1.324-702.0. Home kits on Amazon and Kärcher UK | Several Home & Garden boxes. Official Comfort Premium and WCM Flex eco!Booster. Argos has listed a K7 Power |
| Max pressure | 20 to 145 bar | 180 bar |
| Flow | 500 L/h | 550 to 600 L/h |
| Hose | 10 m PremiumFlex | Typically 10 m |
| Motor | 2.1 kW, water-cooled | Water-cooled |
| Weight (bare, Kärcher) | 12.4 to 13 kg | Varies by box |
| Home kit head | T 5 plus 1 L stone cleaner | Home kits exist and include a T 5 |
| Typical UK price, Aug 2026 | £339.99 | Official from £409.99 to £519.99. Argos has listed a K7 Power at £470 |
Prices checked August 2026. You do not get a longer hose than the K5 Flex. You do not get a safer car setting. You get 35 bar and 50 to 100 L/h, and a heavier Saturday if you leave the Vario open.
Kärcher K5 Power Control Flex
- Buy: Check latest price £339.99
- Part number: 1.324-702.0
- Pressure / flow: 20 to 145 bar, 500 L/h
- Hose: 10 m PremiumFlex
- Motor / weight: 2.1 kW, 12.4 to 13 kg without accessories
- In the box (bare Flex): G 160 Q Power Control gun, Vario, dirt blaster
The upgrade from a K4 is litres and hose, not a different way of washing a car. 500 L/h rinses shampoo and stone cleaner faster. Ten metres means you park the trolley once. 145 bar on a wide fan, a metre back, is fine on modern paint. Used as a pencil jet, close in, it will cut lacquer. The extra bar is for block paving, not for getting closer to the wing. ITS at £339.99 is the cleanest named in-stock street. The £283.33 you see first on that page is excluding VAT. Amazon’s old street around £240 is gone.
Skip it if the only job is cars and garden furniture. Keep the K4 and spend the difference on a foam jet. Skip it if you came here to future-proof a short path with 180 bar. That is how people over-buy a K7. Drive notes sit on the driveway page.
Kärcher K5 Power Control Flex
- Buy: Amazon Home £339.99 · Kärcher UK Home
- In the box (some Flex cartons): K5, Power Control gun, Vario, dirt blaster, 10 m Flex hose, T 5, 1 L stone cleaner
Some boxes include a T 5. Same K5 Flex. If the Flex is £339.99 and a T 5 is about £55, buying them separately is about £395. A Home kit at £330 is then a saving. An ITS Flex Car & Home listed at £480 is a luxury. Shop the live total. Some older Home copy mentions a T 1. Some Flex cartons include a T 5. Open the carton list.
The K7 class
- Pressure / flow: 180 bar, 550 to 600 L/h
- Hose: typically 10 m
- Typical UK price: official from £409.99 to £519.99. Argos has listed a K7 Power at £470
Comfort Premium, WCM Flex, eco!Booster and Power are labels on the same pump class. Official tiles have shown a Comfort Premium at £519.99 and a WCM Flex eco!Booster at £409.99. The step from a £339.99 K5 is about £70 to £180. Used on a wide fan, a metre back, a K7 will wash a car. Used as a pencil jet, close in, it will cut lacquer faster than a K5. Turn it down. Keep the dirt blaster off the paint. Home kits exist and include a T 5. Do not buy a K7 only to clip a patio head onto it. The T 5 and the T 7 Plus both clip onto a current K7 Home & Garden gun. Neither needs 180 bar to spin. Head prices sit on the Kärcher patio cleaner page.
If the 13A lead will not reach, the honest jump is petrol, not a bigger yellow trolley. Skip a K7 if you came from a K4 vs K5 tab and thought the next number must be better. Skip both machines if the only hard surface is a short bay. That is a K4 job.
Cars versus driveway
A car does not need 145 bar, and it does not need 180. It needs a wide fan, distance, and enough hose to walk the body. Kärcher wants a flat jet, at least 15 cm from paint and 30 cm from tyres. The K5 earns its keep on the drive. The K7 earns its keep on a large, neglected plot. Foam is worth more than another 35 bar on paint. An FJ 10 C is about £30 to £33. The cars guide has the order. First-use sits on how to use a pressure washer.
FAQ
Is the K7 worth the extra money over the K5?
Only if you will use 180 bar and the extra flow on a large plot. At official prices of about £410 to £520, the step from a £339.99 K5 is a lot for 35 bar on a car.
Can I wash a car with a K7?
Yes, on a wide Vario, at a distance. Do not use the dirt blaster on lacquer. Do not buy a K7 for cars alone.
Do I need a Home kit?
Only if you do not already own a T 5 and you will use one. A K7 Home kit is still a K7. The head is not the reason to buy one.
Will a T 5 fit both machines?
Yes. Kärcher UK lists the T 5 on K2 to K7 Home & Garden guns. The T 7 Plus is K4 to K7 only. Neither clips onto a Bosch or Nilfisk.
Why is there no single K7 pick?
Because the K7 is a class, not one Flex carton. If you already know you want 180 bar, shop the live carton and the hose. If you are unsure, the K5 Flex is the buy.