No socket, no limit · review
4400 PSI at 4.0 GPM, the most output here, on a house-brand engine.
Where this ends up The highest output on this shelf — seventeen thousand six hundred cleaning units — on Simpson’s own engine rather than a Honda, with no low-oil shutdown published. Its description is for a different model entirely, and names it.
The title and the bullet agree: 4400 PSI, 4.0 GPM, CRX 420cc engine.
The description says: “The SIMPSON PowerShot 4000 PSI at 3.5 GPM… The PS60869 features a commercial SIMPSON 420 engine, reliable AAA industrial triplex pump, 50-ft kink & abrasion resistant hose.”
The PS60869 is the Simpson at $829.94 on this same shelf. It publishes 4000 PSI at 3.5 GPM — and a Honda GX270, not a Simpson 420.
So the description is boilerplate from the neighboring model, with the wrong output, the wrong engine and another product’s model number.
What to trust: the title and bullet agree on the 4400 PSI, 4.0 GPM and the CRX engine, and those are the figures the price is set against.
Worth noting it is not the only slip of its kind here. The Simpson PS61002 at $639.99 is titled 3500 PSI while its own bullet and description both say 3300.
And this is why third-party verification exists: the PowerSmart at $259.99 is the only listing on this shelf with PWMA performance certification, meaning its PSI and GPM were measured by somebody other than the maker.
4400 × 4.0 = 17,600, which is the most work per minute on this shelf.
this — 17,600 · Simpson ALH4240 — 16,800 · Simpson PS60869 — 14,000 · PowerSmart — 9500 · Simpson Aluminum 3600 — 9000 · Westinghouse WPX3400 — 8840 · Simpson PS3228 and PS61002 — 8250 · Westinghouse WPX3200 — 8000 · DeWalt — 7920 · Westinghouse WPX3000 — 6900
The industry measure is PSI × GPM, and no listing here publishes it.
Pressure cuts, flow rinses. At 4.0 GPM this is one of two machines on the shelf with real volume, and volume is what moves dirt off a driveway rather than merely loosening it.
It also drives the accessory that matters most. A surface cleaner has no motor: its two nozzles are spun by the water leaving them, so flow turns the head. A twenty inch head — the widest sold — needs genuine volume, and this has it where the 2.5 GPM machines do not.
The cost is water: four gallons a minute is 240 gallons an hour, which on a metered supply is worth knowing before you start.
Against the PS60869 at $829.94, this is twenty-six per cent more output for seventy dollars — which on paid work pays back quickly, and which is the whole case for this machine.
CRX 420cc, where four other Simpsons on this shelf run a Honda: GX200 on the three smaller ones, GX270 on the PS60869, GX390 on the ALH4240.
Two consequences.
Parts and service. A Honda GX is the most widely serviced small engine family in the world. A carburettor, a recoil spring or a gasket set is available anywhere, and every garden-machinery shop knows it. A CRX is Simpson’s own, and the service network behind it is Simpson’s.
Low-oil shutdown. This listing does not publish one.
The three Honda GX200 Simpsons all publish “low-oil shutdown”. So does the DeWalt at $429. It cuts the ignition when the oil falls below a threshold, instead of letting the engine run dry and seize — which on a machine used three or four times a year after months in a garage is the realistic failure, not a theoretical one.
So $899.99 buys the most output on this shelf attached to the least protected engine on it.
The three Westinghouse machines and the PowerSmart do not publish low-oil shutdown either, which puts this in company it is five hundred dollars dearer than.
AAA industrial triplex plunger, with thermal relief and PowerBoost.
The division across these eleven listings is exact and follows price:
Axial cam — three Westinghouse machines and the DeWalt. Driven straight off the crankshaft, cheap, sealed and unserviceable, rated in the low hundreds of hours.
Triplex plunger — all five Simpsons. Three pistons on their own crankshaft, running slower and cooler, with replaceable seals, rated in the thousands of hours.
“Maintenance-free” appears on both types. On an axial cam it means unserviceable; on a triplex it means the crankcase oil is filled for life while the seals and valves can be changed.
Thermal relief is the valve that keeps it alive. Release the trigger and the pump keeps turning with water trapped inside, heating within a minute or two — and above a certain temperature the seals go. The valve dumps it first. That is the commonest death of any pump on this shelf, and the three Westinghouse machines publish no such valve at all.
What this does not publish, unlike the three smaller Simpsons, is an integrated unloader — the companion valve that diverts flow at the pump when the trigger is off.
PowerBoost Technology appears here, on the PS60869 and on the Aluminum 3600, described as “delivering higher pressure at the nozzle” and explained on none of the three.
“Monster 3/8-inch x 50-foot high-pressure hose… with quick connect fittings and polyurethane outer jacket.”
Both figures matter together. A hose loses pressure to friction, and a narrower bore loses more — so bore scales with length and flow:
Westinghouse WPX3000 — 0.25 inch over 25 feet at 2.3 GPM Simpson PS3228 and Aluminum 3600 — 5/16 inch over 25 and 35 feet at 2.5 GPM this, the PS60869 and the ALH4240 — 3/8 inch over 50 feet at 3.5 to 4.0 GPM
Fifty feet of 5/16 inch at 4 GPM would cost real pressure at the nozzle. The Monster hose is wide because it has to be.
Quick connect fittings rather than the threaded M22 the other four Simpsons publish is a small practical difference: quicker to swap, marginally more to go wrong.
The polyurethane jacket is the detail three Simpson listings share and no other brand here does: fifty feet of hose gets dragged across whatever you are cleaning, and a rubber one leaves black streaks on painted siding and decking.
And the 31 inch steel wand is nearly twice the 16 inch wands on the three smaller Simpsons and the DeWalt — the difference between reaching a soffit from the ground and fetching a ladder.
61,235 g is the heaviest machine on this shelf:
Westinghouse WPX3000 22,997 g · PowerSmart 27,669 g · WPX3200 28,576 g · WPX3400 28,600 g · DeWalt 29,030 g · PS61002 33,021 g · PS3228 33,929 g · Aluminum 3600 35,834 g · PS60869 54,431 g · ALH4240 56,245 g · this 61,235 g
That is 135 lb, and this listing publishes no weight in its bullets to confirm it — where the PS60869 publishes “120 pounds” against a catalog of 54,431 g (1920 oz), which is 120.0 lb exactly.
The 13 inch premium pneumatic tires are what make it movable, and the three heaviest Simpsons all use them where the lighter ones use 10 inch. A bigger wheel rolls over gravel and climbs a curb with far less effort. The three Westinghouse machines use 12 inch never-flat solid wheels, which cannot puncture but skid on gravel — a fair trade at 23 kg (50.7 lb) and not at 61.
And the catalog dimensions — 203 × 76 × 1270 mm (7.99 × 2.99 × 50 in), or 8 × 3 × 50 inches — are the shape of a wand or a coiled hose, not a machine. The two Simpsons nearest it in weight both publish “38” L x 23.5” W x 29” H” with catalog figures that agree. Measure your garage against 38 inches and ignore the catalog here.
“Keep max fuel level 1/2 Inch below bottom of filler neck to avoid spillage.”
Petrol expands as it warms. A tank filled to the brim in a cool garage pushes fuel out of the cap vent once the engine has run — onto a hot engine and down the frame. Half an inch of air absorbs it.
The DeWalt and the ALH4240 carry the same note, and all three also share the candour that the machine is “100% functionally tested in factory” and may hold residual fuel or odor. It arrives having been run, which is reassuring and is also why it smells.
What no listing here mentions is the other half: stale petrol in a carburettor is the commonest reason one of these will not start the following spring.
0°, 15°, 25°, 40° and soap, with an ergonomic spray gun.
At 4400 PSI the 0° tip deserves the caution no listing on this shelf gives. A zero-degree nozzle has no fan at all: it is a pencil jet that cuts flesh, carves grooves in decking in a single pass, and drives mortar out of brickwork. Simpson’s own phrasing for the set — “from stripping paint to car cleaning” — is accurate, and stripping paint is the 0° and 15° job.
Use the 25° for most work and the 40° on anything painted or wooden.
And this gun has no safety lock-out. Only the Aluminum Series 3600 at $729.99 and the ALH4240 at $1448.99 publish one. At 4400 PSI with a 0° tip fitted, a gun set down on the frame with the engine running is the most dangerous object on this shelf.
No low-oil shutdown, as above — the gap that matters most on this listing.
No warranty. The three Westinghouse machines publish “3-Year Limited Service, Labor, and Parts Coverage with Nationwide Customer Service and Support Network”. All five Simpsons, the DeWalt and the PowerSmart publish nothing, on a machine at $899.99.
No integrated unloader, which the three smaller Simpsons publish.
No safety lock-out on the gun.
No usable dimensions, and no weight in the bullets.
No soap tank or detergent route — a soap nozzle and nothing about where the soap comes from, on a machine sold for “deck cleaning, wood restoration, paint preparation”, all of which start with a chemical.
No PWMA certification, which only the PowerSmart claims.
And it does not ship to California, which this listing states twice — the only one here to say it in both the compliance note and as a shipping restriction.
Read on the day this page was built: $900 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-04. The live price is at the top of the page.
| Output | 4400 PSI at 4.0 GPM — 17,600 cleaning units, the highest on this shelf |
|---|---|
| Engine | CRX 420cc — Simpson’s own, not a Honda, see the FAQ |
| Low-oil shutdown | NOT published, where three cheaper Simpsons and the $429 DeWalt publish one |
| Description mismatch | Its description reads 4000 PSI at 3.5 GPM and names model PS60869 — see the FAQ |
| Pump | AAA industrial triplex plunger with thermal relief and PowerBoost |
| Hose | 3/8 inch by 50 foot Monster with quick connect fittings and a polyurethane jacket |
| Wand | 31 inch steel |
| Tires | 13 inch premium pneumatic |
| Weight | 61,235 g (2160 oz) — the heaviest machine on this shelf |
| Fuel note | Keep the level half an inch below the filler neck to avoid spillage |
| Compliance | 49-state, and does not ship to California |
| Dimensions | Catalog gives 203 × 76 × 1270 mm (7.99 × 2.99 × 50 in), which cannot be the machine |
| Warranty | Not published |
| Amazon reference | B01KZSGRTE |
| EAN | 0879399002670 |
Because it is the wrong description, and the model it names is on this same shelf. The title says "4400 PSI... 4.0 GPM, CRX 420cc Engine" and the bullet agrees: "delivers 4400 PSI at 4.0 GPM". The description then reads: "The SIMPSON PowerShot 4000 PSI at 3.5 GPM is ideal for prosumers and professionals alike... The PS60869 features a commercial SIMPSON 420 engine, reliable AAA industrial triplex pump, 50-ft kink & abrasion resistant hose." The PS60869 is the Simpson at $829.94 on this shelf, and it publishes exactly 4000 PSI at 3.5 GPM — with a Honda GX270, not a Simpson 420. So the description belongs to a different product, with different output and a different engine. What to trust: the title and the bullet agree on 4400 PSI, 4.0 GPM and the CRX 420cc, and they are the figures the catalog price is set against. The description is boilerplate from the neighboring model. Worth noting the pattern on this shelf — the Simpson PS61002 at $639.99 is titled 3500 PSI while its bullets and description both say 3300.
It is unknown in a way a Honda is not, and it is missing one feature every Honda here publishes. This runs Simpson’s own "CRX 420cc premium engine". The PS60869 at $829.94 — seventy dollars less — runs a Honda GX270; the three smaller Simpsons run Honda GX200; the ALH4240 runs a Honda GX390. Two things follow. Parts and service: a Honda GX is the most widely serviced small engine family in the world, so a carburettor, a recoil spring or a gasket set is available anywhere and every garden-machinery shop knows it. A CRX is not. Low-oil shutdown: this listing does not publish one, where the three Honda GX200 Simpsons all do and so does the DeWalt at $429. A low-oil cutout kills the ignition before the engine seizes, which on a machine used a few times a year after months standing is the realistic failure. So $899.99 buys the most output on this shelf with the least protected engine on it. Against that: 17,600 cleaning units versus the PS60869’s 14,000 is a twenty-six per cent difference, which on paid work is real.
No. The catalog publishes 203 × 76 × 1270 mm (7.99 × 2.99 × 50 in), which is 8 × 3 × 50 inches — the shape of a wand or a coiled hose, not a 61 kg (134.5 lb) pressure washer with 13 inch wheels. For comparison, the two machines nearest it in weight publish real figures: the PS60869 gives "38” L x 23.5” W x 29” H" with a catalog of 965 × 597 × 737 mm (38 × 23.5 × 29 in), and the ALH4240 gives the same 38 × 23.5 × 29 inches with a catalog of 965 × 597 × 737 mm (38 × 23.5 × 29 in). Those agree with each other and with their bullets. This listing publishes no dimensions in its bullets at all, so there is nothing to check the catalog against — and at 61,235 g (2160 oz), the heaviest machine on this shelf, it is almost certainly the same 38 × 23.5 × 29 inch frame as the two Simpsons beside it. Treat the catalog figure as unusable and measure your garage against 38 inches of length. Four listings on this shelf publish no dimensions; the DeWalt publishes "L:41” x W:21” x H:24”".
Measured against the median of its own aisle here — not against everything on sale.
cleaning machines from the same category, at nearby prices. Only what all of them publish is shown: a column with holes compares nothing.
| Model | Price | Engine | Pump | Hose | Tires |
|---|---|---|---|---|---|
| Simpson 60843 | $900 | CRX 420cc — Simpson’s own, not a Honda, see the FAQ | AAA industrial triplex plunger with thermal relief and PowerBoost | 3/8 inch by 50 foot Monster with quick connect fittings and a polyurethane jacket | 13 inch premium pneumatic |
| Simpson PS60869 | $830 | Honda GX270 — a real Honda, where the dearer CRX uses a house engine | AAA industrial triplex plunger with thermal relief, direct drive | 3/8 inch by 50 foot Monster, kink and abrasion-resistant | 13 inch premium pneumatic |
| Simpson 60689 | $730 | Honda GX200 with low-oil shutdown | AAA triplex plunger with an integrated unloader, thermal relief and PowerBoost | 35 feet, Morflex 5/16 inch, non-marring and abrasion-resistant | 10 inch premium pneumatic |
| SIMPSON PS3228 | $660 | Honda GX200 with low-oil shutdown | Maintenance-free AAA triplex plunger with an integrated unloader and thermal relief | 5/16 inch by 25 foot Morflex — the bore is published, which its twin omits | 10 inch premium pneumatic |
Details checked on October 4, 2026.
Paid work where output decides the day, by someone who will check the oil
Amazon reports what buyers took in the month before this page was last checked: at least 200.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for cleaning machines and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
2,200 PSI (≈ 152 bar) · 2.3 GPM · single-cylinder air-cooled
The most modest petrol machine here, and the only one listed on all six Amazon stores.
Best for: Large gardens and outbuildings without power, where 150 bar is plenty
170–190 bar · 3,400 rpm · axial cam pump · self-priming
A modest pressure range honestly stated, on an axial pump — the entry to petrol here.
Best for: Occasional work away from a socket — a smallholding, a boat yard, a second property
234 bar working · 590 l/h · 5.9 hp four-stroke · 9 m (30 ft) hose
The only machine on this site that publishes a working pressure and a flow rate together.
Best for: Farmyards, contractors and large properties without power at the far end
