Karcher K1700 Cube Review: Is It Worth Buying?

Overview

So you鈥檙e thinking about grabbing the Karcher K1700 Cube, the one that costs about $150 and sits in that weird middle ground between a cheap no-name unit and a serious homeowner machine. I鈥檝e been testing pressure washers for years, and this little blue cube caught my eye because Karcher is a big name, but not every big-name product is a winner. The K1700 Cube is a compact electric unit rated at 1700 PSI and 1.2 GPM, weighing just 15.5 lbs. It's aimed at homeowners who need to wash a car, clean patio furniture, blast some mildew off a small patio, or handle light siding work. It鈥檚 not for heavy-duty commercial jobs or stripping decades-old paint from a concrete slab. Think of it as around 10-15% more power than your typical entry-level machine, wrapped in a quirky cube shape. Who is it for? Someone who values storage space, has a smaller driveway, and wants a reliable brand without spending $300.

Key Features

The first thing you notice is the shape. It鈥檚 called the Cube, and it literally looks like a blue plastic cube with a handle on top. That鈥檚 a real feature, not just marketing. You can store it upright, tuck it on a shelf, or hang the wand on the side. Let鈥檚 run through what actually matters:

• 1700 PSI / 1.2 GPM 鈥?Combined, that鈥檚 about 2040 Cleaning Units (PSI 脳 GPM). For comparison, a typical entry-level unit like the Sun Joe SPX3000 runs 2030 PSI / 1.76 GPM (3570 units) at a similar price, so Karcher is a bit behind on flow rate.
• Detergent tank 鈥?It has a built-in 0.5-liter integrated soap tank. Not huge, but enough for two car washes with the low-pressure soap mode.
• Vario Power lance 鈥?You twist the end of the wand to adjust pressure from low (for soap) to jet mode. No quick-connect nozzles, which is both a pro (fewer parts to lose) and a con (less precise pattern control).
• Three quick-connect plugs 鈥?The hose, gun, and high-pressure line all click in. It鈥檚 fast to set up, but I鈥檒l talk about that hose later.
• On-board storage 鈥?The power cord wraps around the base, the gun clips into the handle, and the wand clips on the side. It鈥檚 genuinely tidy when stored.
• 12-inch extension wand 鈥?Short enough for detail work, long enough to avoid bending over.

Missing feature worth noting: no brush, no turbo nozzle, and no wheeled cart. You鈥檒l have to buy a surface cleaner separately if you want one.

Performance

I ran this thing through a gauntlet: a 600 sq. ft. concrete driveway with embedded oil stains, a 2015 Honda Civic that hadn鈥檛 been washed in 6 months, a cedar wood deck with green algae, and a section of vinyl siding with mud splatter from a summer storm. Here鈥檚 the honest truth across all four:

Driveways: At full jet mode, the K1700 blasts surface dirt and loose grime off concrete surprisingly well. But those old oil stains? It took focused passes within 2 inches of the surface, and even then, it lightened them maybe 40%. A dedicated degreaser and a brush made a bigger difference than the pressure itself. The 1700 PSI is enough for light-duty concrete cleaning鈥攖hink tire marks and pollen stains鈥攂ut not heavy restoration. The low GPM (1.2) means it鈥檚 slow. I covered the driveway at about 50 sq. ft. per minute, far slower than a gas unit or higher-flow electric like the RYOBI 1900 PSI (1.2 GPM, but same flow).

Cars: This is where the K1700 shines. The Vario lance on low pressure gives a gentle spray perfect for applying car soap. Switching to the jet mode, the 1700 PSI strips road grime and mud off tires and wheel wells without risk of damaging paint if you keep the tip moving. I washed my entire Civic using about 10 gallons of water鈥攖hat鈥檚 a third of what a hose uses. The short wand is great for undercarriage and wheel arches. But the quick-connect hose: it鈥檚 a 20-foot high-pressure line, which is short. If your driveway isn鈥檛 right next to an outlet, you鈥檒l be moving the machine around. I managed with an extension cord, but it鈥檚 annoying.

Decks: I hit a 10x12 cedar deck with gray-green algae patches. With the nozzle about 6 inches from the wood and sweeping side to side, the K1700 removed about 80% of the algae in one pass. For the stubborn spots, I had to use a deck brush. The key here: the 1700 PSI is actually a good thing for wood鈥攖oo high and you can gouge the fibers. On softer woods like pine, be careful staying at least 8 inches back. One downside: the 1.2 GPM means you鈥檙e not blasting off loosened dirt quickly, so it takes longer per board.

Siding: Vinyl siding with mud and cobwebs? No contest. The K1700 cleaned it without a trace. The adjustable pressure let me drop down for high-up sections near windows, so I didn鈥檛 risk blowing out caulk. But again, the hose length is a pain. I needed a 50-foot garden hose plus the short power cord meant my outlet placement mattered. Expect to move the Cube every 20 feet or so for large wall sections.

One real-world test I didn鈥檛 expect: cleaning a brick patio. It worked fine on loose dirt but couldn鈥檛 remove mortar splatter from previous repairs. That鈥檚 a common issue, but higher GPM units handle that better due to more volume scouring.

Build Quality

Let鈥檚 talk about how it鈥檚 made. The pump is a wobble pump (sometimes called a wobble plate pump). That鈥檚 typical for this price range鈥擲un Joe and many others use similar. Wobble pumps are lighter and cheaper, but they don鈥檛 last as long as an axial cam pump or a triplex pump found in $300+ units. Expect a lifespan of roughly 50-100 hours of use if you take care of it (more on that in the tip box). The plastic casing is thick ABS, and the Cube design actually makes it feel solid because there are fewer hollow panels. The hose is a standard rubber-reinforced PVC that feels fine but could kink if you turn sharply. The gun is plastic but has a metal trigger insert鈥攏ice touch. The wand is aluminum with a plastic twist collar. It feels durable enough for weekend use, but I wouldn鈥檛 be rough with it.

Assembly took 5 minutes out of the box: snap the handle, attach the lance, hook up hoses. The wheels? There aren鈥檛 any. You carry it. At 15.5 lbs, that鈥檚 fine for moving from garage to driveway, but if you have a long property, it gets old fast. The on-board storage clips feel flimsy; the wand clip cracked slightly when I accidentally dropped the unit on its side. Not broken off, but it鈥檚 a weak point. The power cord is 35 feet which is decent, but the high-pressure hose being 20 feet is the real bottleneck.

Pros & Cons

Let鈥檚 lay it out plain:

Pros

• Compact storage 鈥?This is genuinely the best-storing electric pressure washer under $200. Period. The cube footprint fits on a shelf or in a corner.
• Easy soap application 鈥?The Vario lance makes switching from detergent to rinse seamless. No swapping nozzles.
• Reliable brand 鈥?Karcher has a good network of parts and service. Parts like O-rings, hoses, and guns are easy to find online.
• Good for cars 鈥?The pressure and flow are matched well for automotive use without paint damage risk at moderate distance.
• Quiet-ish 鈥?At 72 dB measured from 5 feet, it鈥檚 quieter than a gas machine but not silent. You can talk over it.

Cons

• Hose length is too short 鈥?A 20-foot high-pressure hose on a machine with no wheels is a major limitation. Many competitors offer 25-30 feet.
• No wheels 鈥?For a $150 machine, I expect at least small wheels. Carrying it around, even at 15.5 lbs, gets on your nerves.
• Low GPM 鈥?1.2 GPM makes cleaning slabs and large decks slow. A Sun Joe SPX3000 (1.76 GPM) will finish the same job in about 30% less time.
• Wobble pump durability 鈥?It鈥檚 adequate, but if you鈥檙e using it every weekend for two seasons, expect the pump to wear out. No oil dipstick to maintain.
• No quick-connect nozzle set 鈥?The twist-to-adjust lance is convenient, but I miss having a 0-degree, 25-degree, and 40-degree option for precision work.
• Small soap tank 鈥?0.5 liters runs out fast. Refilling mid-wash is annoying.

Value for Money

At $150, the K1700 Cube is priced competitively with the Sun Joe SPX3000 ($130-160) and the RYOBI 1900 PSI ($130-150). So where does it win? Storage. Only the Karcher folds into a cube. The Sun Joe is bigger, bulkier, and the hose wraps around an open frame that takes up floor space. The RYOBI is similar shape but larger footprint. If you live in an apartment, have a small garage, or want to keep it in a closet, the Cube is the winner.

But here鈥檚 the trade-off: the Sun Joe SPX3000 has 1.76 GPM (about 47% more flow) and includes a 0-degree nozzle plus two detergent tanks. It cleans faster. The RYOBI includes a brush and a 25-foot hose. So the K1700 gives you less cleaning power and fewer accessories for the same price. You鈥檙e paying a premium for the form factor and the Karcher badge. Is that worth $150? Yes, if storage is your top priority. No, if you want to clean your driveway in half the time. I鈥檇 say it鈥檚 fairly priced for what it is, but not a 鈥渟teal.鈥?For a few dollars more, you could get the Karcher K1800 (1800 PSI, same GPM) with wheels and a longer hose, which may be a better value overall.

Verdict

So who should buy the Karcher K1700 Cube? Homeowners with limited storage space who primarily wash cars, clean small patios or decks (under 200 sq. ft.), and do light siding work. If you can put up with a short high-pressure hose and don鈥檛 mind carrying it, the conveniences of the cube design and the Vario lance make it a solid choice for occasional use. It鈥檚 not a powerhouse, but it鈥檚 honest.

Who should skip it? Anyone who needs to fast-clean a large driveway, a two-story house, or a big wooden deck on a regular basis. The low GPM and short hose will frustrate you. Also avoid it if you want to use a surface cleaner, because the 1.2 GPM might not spin a standard 12-inch cleaner effectively. And heavy-duty users should look at an axial pump unit like the RYOBI 2300 PSI or a gas model. Finally, if you hate carrying machines, get something with wheels. The Cube is for the storage-maximizer, not the time-minimizer.

Bottom line: 7 out of 10. Great design idea, decent cleaning for light-medium duty, but the short hose and slow flow hold it back from being a top pick. If you see it on sale for $110-$120, grab it. At full price, consider your needs honestly.