Kärcher Pressure Washer K1800PS Cube, CETA Certified, 3 Spray Nozzles, Detergent Tank, for Cars, Driveways, Siding, Patios, 1.2 max. GPM
Original price was: $218.99.$149.99Current price is: $149.99.
Guaranteed Safe Checkout
Features & Compatibility
Price: $218.99 - $149.99
(as of Apr 01, 2026 21:03:51 UTC – Details)
The Kärcher K1800 Cube is a compact electric pressure washer ideal for everyday cleaning. With a 1800 PSI CETA™ certified TruPressure™ output and a GPM of 1.2, this power washer is easy to use for any homeowner and perfect for maintaining your home’s exterior. The kit includes three different spray nozzles with a universal quick-connect fitting: a 15° nozzle for regular cleaning tasks, a turbo nozzle for intense cleaning power, and a 65° soap nozzle for applying detergent and achieving a sparkling finish. The integrated detergent tank on the top of the unit makes it easy to apply your favorite pressure washer detergents. For added convenience, the detergent tank is removable to fill and clean when needed. Thanks to the three different nozzles, the K1700 Cube can be used to clean cars, patios, fencing, decks, and much more. With a size of only 15.1 x 12.6 x 11.8 in. and a weight of around 16.3 lbs, the K1800 Cube is perfect for anyone with limited storage space and who seeks a lightweight unit that is easy to carry around. Its compact design makes it a breeze to store in your garage, shed, or even a small shelf. The integrated storage container on the back of the unit keeps the trigger gun, hose, and spray wand neatly stored away while not in use, ensuring everything stays organized. The nozzles can be secured on the detergent tank when not in use, so you never misplace one ever again. No tools are needed for the assembly of the K1800 Cube, so you can start cleaning as soon as it arrives. The on/off foot switch provides easy power control, allowing you to turn the pressure washer on and off with a simple tap of your foot. Water flow is controlled separately through the trigger gun. This set includes the K1800 Cube, a pressure washer gun, a spray wand, a 15° nozzle, a 65° nozzle, a turbo nozzle, an adapter for 3/4″” garden hose, a removable detergent tank, and a M22 20 ft. pressure washer hose.
COMPACT & CETA CERTIFIED: 1800 PSI TruPressure and 1.2 GPM for effective cleaning of various surfaces. Independently tested and CETA certified for proven performance you can trust
VERSATILE CLEANING OPTIONS: Equipped with three different nozzles (15°, turbo, and 65°), the K1800 Cube allows you to tackle a wide range of cleaning jobs with precision
USER-FRIENDLY OPERATION: Featuring an on/off foot switch, easily power up the pressure washer without bending over, making your cleaning tasks more convenient
PORTABLE UNIT: Its lightweight and compact cube shape makes it easy to carry and store, ideal for those with limited space. On top, it features a 0.3 gal detachable detergent tank
THE KÄRCHER PROMISE – CLEANER. QUICKER: The K1800 Cube power washer is perfect for cleaning pavement, patios, decks, cars, homes, fencing, and much more
Cesar Velez –
Very compact and lightweight
Nice and compact and lightweight, mounted on a shelf in my garage, and put a 150-foot hose and reel on it, It has been working great, with good pressure, not as much water flow but it is expected, overall no issues, and have used it a lot around the house (prepping roof for sealer re-coat, washing exterior walls and windows, cleaning concrete floors, washing cars, etc.) Much more practical than a gas power machine and can be moved very easily if needed, NOTE it has less power and flow than a gas-powered one but it’s good for most applications without the hassle of gas and pull starting it.
Biff44 –
works well
needed to buy a new one. reserched around and found Karcher is still selling them–they were one of the firsts selling electric ones.this one is compact and light. does a really good job cleaning up the patio. does tasks like blasting green scrunge off of chairs and stairs.like all of these pressure washers, you need to insure there is enough FLOW of water for it to work. Initially it was stuttering, then i remembed i had my whole house water filter in the line. when i switched the whole house filter to bypass, it worked fine.despite its cheap price and small size, it MOVES A LOT of water at a pretty high pressure.Being compact, i can easily store it in the basement for the winter too!I am very happy with the investment.about the only thing i wish is that the pressure hose would be another 10 feet longer.
Vlada –
Great pressure washer
Love it. Easy to use and cleans so good! Has a good power spot won’t take long to clean even your driveway. Compact and easy to store.
John W. Wilson –
Works well and compact but not quite enough pressure power for me.
Went together easily enough and is well made nice brass fittings. I figured the 1800 PSI was going to be enough but it took a long time to clean the concrete patio and clean off the fountain algae build-up.
Skates of Wrath –
Works like a dream!
I bought the 1800PS Cube, and it works amazingly. I’ve had a Karcher power washer before, but it only had the 15° nozzle. When I cleaned, I had to hold the nozzle a few inches from the ground and it tended to leave stripes everywhere. My first time using this product, I initially used only the 15° nozzle, thinking that the “Turbo” would be too powerful for cleaning my paver stones. I was wrong! What a difference! It blasted the dirt and mold away so easily, and didn’t leave any streaks behind. I was done in no time. With the old pressure washer my hands and back were so sore and cramped afterward, but this one was much more user-friendly.I’m glad I got the cube instead of the wheeled version. It’s easy to move around and it packs so compactly I was able to fit it right on a shelf.The only possible negative criticism would be that it doesn’t have an adjustable flow. You can only control the power of the spray by how closely you are to the surface you’re cleaning. For my patio I would only need a powerful spray, but if you’re cleaning something that can dent, make sure to stand farther back when you first turn the hose on.
David –
Leaky nozzle connection right out of the box
I was excited to get this Kärcher K1800PS pressure washer after reading the positive reviews. Unfortunately, right after assembling it and following the setup instructions, I encountered a major issue that prevents the washer from functioning properly.The problem is with the nozzle quick connect fitting. No matter how tightly I connect the different nozzles, there is a constant leak from this connection point when the washer is turned on. The nozzles themselves feel loose and don’t seem to lock in securely even when fully inserted.I’ve included a video showing the leak and how the nozzles are loose even when fully inserted. You’ll see water spraying out from the base of the nozzle instead of just coming out the spray tip.It’s disappointing because otherwise the pressure washer seems well-built and powerful based on my initial impressions. But this leaking nozzle connection is a dealbreaker and means I’ll have to return this unit for a refund or replacement.I’d recommend checking this connection point carefully if purchasing this model. Hopefully my issue was just a single defective unit, but it renders the whole thing unusable right now. I’ll update if I’m able to exchange it for one that doesn’t have this leaking problem.
JIMBOB –
Works well
Works well. Well made perfect size to store and move around.
Amazon Customer –
Great for washing cars
Good quality and for a good price. My only complaint is that I wish the cord/hose were longer. Overall it works as we had hoped. If you’re looking for something with the same power as gas, this is not it. However, it has ample power for washing cars, maybe just not cleaning siding on a house several feet above your head.
Ian –
I only used this machine once and it does not work as it is supposed to. I wish I tried it out as soon as I bought it so I could have returned it. The “swirl motion” (not sure what its called) tip does not swirl. The machine pressures up intermittently / when it wants to. Water leaks internally and pours out the side. The wand is loose even though threaded all the way.
Eden25/50 –
I am very happy with my purchase great item
Calvin Hunter –
Purchased after seeing many good reviews both here and on other sites. Have to say I am incredibly disappointed. I see a lot of the reviews are a few years old so it’s possible the manufacturer has changed things for the worse.The OK:So far the actual pressure washer – the unit itself – is fine. I’ve only used it a few times so we’ll see if it holds up. The form factor is very convenient. To be completely honest, I have my doubts about how long it will last just based on the quality of the pipe fittings coming out of the plastic shell. They look extremely poorly made and if that’s an indicator for the quality of the rest of the internal components, I don’t have high expectations for durability.The Bad:This might be an issue with my unit specifically, but the unloader valve either doesn’t work or isn’t set properly, so pressure just builds up when you let go of the trigger and causes a huge kick when you press it afterwards.The pressure washer wand is the I’ve ever used. Worse than the cheap Simoniz ones. Way worse than the cheap Chinese drop shipped one I replaced it with.The nozzle attachments it comes with are awful. One of them broke the first time I used the machine – shot the little metal insert (not the nozzle itself, but the piece of metal inside it) out of the nozzle like a bullet. Luckily I always point at the ground when I start it.The hose is also the worst pressure washer hose I’ve ever had. It is comically short (a “generous” 25 feet), incredibly stiff, kinks constantly, and is altogether miserable to use.The soap dispenser on the machine is awful and inconvenient. It isn’t removable, so if you do use it, you have to use all of the soap and then flush it out before you can have clean water again.The M-F filter fitting that the unit comes with is cheap plastic junk and broke on my 2nd use. This thing is probably the cause for all the complaints about leaks you see in other reviews.If you’re going to buy this unit and plan to use it more than once a year, plan on also buying the following:Brass M-F fitting for the garden hose connection.Brass Quick disconnect fitting for the garden hose connection.Brass Quick disconnect fitting for the pressure hose connection.Brass Quick disconnect fitting for your wand.A new wand/gun.A new hose.A foam cannon/soap attachment for your wand.You can probably add $100-200 to the price of the unit for all of this, just to get to something you won’t hate using.
D D –
See all my comment in the Headlinehis Karcher was wrongly advertised as could be used in the UK NO Supplied with american voltage had to purchase a voltage converter which when connected the machine still did not work also the connecting coupler for mains connection was faulty leaking unable to stop a call to Karcher C/services phone found answer were closed and return tomorrow e mail address did not work end view its cost me time and money which some of it I cannot get back Amazon sending item back and returning part of my costs regretfully I’m not the usual happy customer shopping with this company. The american side is unhelpfull also you cannot register the machine for use in the uk its onl america & Canada.
David Wilson –
It was not for the UK Market 240Volt. This Item was for 120Volt for USA Market etc thats why it was returned?