No socket, no limit · review
3600 PSI, a 35 foot hose and a gun with a safety lock-out, at 78 pounds.
Where this ends up An aircraft-grade aluminum frame sold on cutting weight, on a machine that weighs a pound more than the steel-framed Simpson below it. What the seventy-one dollars really buys is three hundred more PSI and ten more feet of hose.
The description says the aluminum frame “resists corrosion and cuts weight”. The bullet publishes 78 lb.
The steel-framed Simpson PS3228 at $659 publishes 77 lb. The steel-framed PS61002 at $639.99 publishes 74 lb.
All three have the same Honda GX200, the same AAA triplex plunger pump and the same 2.5 GPM.
So the aluminum machine is one to four pounds heavier than the steel ones.
Two differences could account for it, and both are real. This delivers 3600 PSI rather than 3300, which generally means a larger pump. And it carries 35 feet of hose rather than 25 — ten extra feet of braided high-pressure line is a few pounds on its own.
The catalog figures track the bullets closely, at 35,834 g (1264 oz) here against 33,929 g (1196.8 oz) for the PS3228, so the numbers agree with each other. It is the marketing they disagree with.
What aluminum genuinely buys is corrosion resistance, which the bullet also claims and which is the sounder argument. A powder-coated steel frame rusts from any chip, and a pressure washer lives in a damp garage and gets soaked every time it is used. Aluminum does not care.
The description’s “brushed, extruded tubing” is the honest version: extruded aluminum tube is stiff, light per unit of section, and does not rust.
Four things change, and they are all worth something.
Pressure: 3300 → 3600 PSI. In cleaning units — PSI × GPM, which no listing here publishes — 8250 → 9000, about nine per cent.
Hose: 25 → 35 feet. The difference between moving the machine twice round a house and once.
Frame: welded powder-coated steel → aircraft grade aluminum. Corrosion, as above.
Gun: gains a safety lock-out, which the PS3228 does not have.
What stays identical: the Honda GX200 with low-oil shutdown, the AAA triplex plunger pump with integrated unloader and thermal relief, the 5/16 inch Morflex hose, the 10 inch pneumatic tires, the threaded M22, the five tips, the 16 inch wand, the 21 × 24 × 34 inch footprint.
So a meaningful step rather than a transformative one.
And the figure that puts it in context: the PowerSmart at $259.99 delivers 9500 cleaning units — more than this — with PWMA performance certified figures, meaning verified by somebody other than the maker. What it does not have is a rebuildable pump, a Honda engine, thermal relief, or a hose that will not mark your siding.
Output is cheap on this shelf. Durability is not.
3600 × 2.5 = 9000.
Simpson CRX 4400 — 17,600 · Simpson ALH4240 — 16,800 · Simpson PS60869 — 14,000 · PowerSmart — 9500 · this — 9000 · Westinghouse WPX3400 — 8840 · Simpson PS3228 and PS61002 — 8250 · Westinghouse WPX3200 — 8000 · DeWalt — 7920 · Westinghouse WPX3000 — 6900
Pressure cuts, flow rinses. At 2.5 GPM this has the same flow as five other machines here and more pressure than any of them — which suits the work the listing names: “deck cleaning, wood restoration, paint preparation”.
Those are all pressure jobs rather than volume jobs. Stripping a weathered deck or preparing siding for paint is about lifting a bonded layer, and 3600 PSI with the 15° tip does that where 3000 struggles.
Where 2.5 GPM shows its limit is a long driveway, where you are pushing dirt rather than cutting it. The three big Simpsons move to 3.5 and 4.0 GPM for exactly that.
For a surface cleaner, 2.5 GPM will drive a twelve to sixteen inch head properly — the head has no motor, and its nozzles are spun by the water leaving them, so flow turns the arm.
“Professional QC spray gun with safety lock-out.”
The trigger is the only thing between a 3600 PSI jet and whatever is in front of it.
Two listings on this shelf publish a lock: this and the ALH4240 at $1448.99. The other nine publish none — the PS61002 and PS3228 have a “rear-load M22 pressure washer gun”, the DeWalt an “ergonomic spray gun”, the three Westinghouse machines a “lightweight spray gun”.
What a lock prevents: a gun set down on the frame or a step with the engine running, where a foot, a hose or a dog can pull the trigger.
And the reason that is not a theoretical concern — every machine on this shelf ships a 0° tip, and not one of the eleven listings warns about it. A 0° nozzle has no fan at all: it is a pencil jet that cuts flesh, carves visible grooves in decking in one pass, and drives mortar out of brickwork.
Simpson’s own description of the tip set is accurate and is also the warning: “cover tasks from stripping paint to car cleaning”. Stripping paint is the 0° and 15° job.
Use the 25° for most work, the 40° on anything painted or wooden, and keep the 0° for concrete you do not mind marking.
AAA triplex plunger, with an integrated unloader and thermal relief.
The division across these eleven listings is exact:
Axial cam — three Westinghouse machines and the DeWalt. Driven straight off the crankshaft, cheap, and described by Westinghouse as “maintenance-free”, which means 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.
And the two valves are what keep it alive. An unloader diverts flow at the pump when the trigger is released, rather than letting pressure build against a closed gun. Thermal relief dumps water before recirculation heats it enough to wreck the seals.
The commonest way any of these pumps dies is being left running with the trigger off. The three Westinghouse machines publish neither valve; the DeWalt publishes thermal relief alone.
PowerBoost Technology — “delivers higher pressure at the nozzle” — appears on this, the CRX 4400 and the PS60869, and is explained on none of the three. Treat it as an unexplained term rather than a specification.
Honda GX200 with low-oil shutdown, shared with the PS61002 and PS3228.
The most widely serviced small engine in the world: a carburettor, a recoil spring or a gasket set is available anywhere, and anyone who services mowers knows it. Low-oil shutdown cuts the ignition before the engine seizes, which on a machine used a few times a year after months in a garage is the realistic failure.
It is absent from the three Westinghouse listings, the PowerSmart, and the $899.99 Simpson CRX — which runs Simpson’s own CRX 420cc engine rather than a Honda.
The hose is non-marring, which three Simpson listings publish and no other brand here does. Thirty-five feet of high-pressure line gets dragged across whatever you are cleaning, and a rubber hose leaves black streaks on painted siding, decking and paving. A polyurethane jacket does not.
And the bore is published in the description as 5/16 inch, which matters: a hose loses pressure to friction, and bore has to scale with length. The 50 foot Monster hoses on the three big Simpsons are 3/8 inch for that reason, and the Westinghouse WPX3000 publishes the narrowest here at 0.25 inches over 25 feet.
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.
Which remains the counter-argument to the whole Simpson case: the machines with the rebuildable pump carry no promise, and the machines with the sealed pump carry three years.
No soap tank or detergent route. Two Westinghouse machines publish a “Half Gallon Onboard Soap Tank”, the third a “detergent siphon hose”, the PowerSmart an onboard tank. This publishes a soap nozzle and nothing about where the soap comes from.
No PWMA certification, which only the PowerSmart claims.
No fuel tank capacity.
No explanation of PowerBoost.
And not for sale in California, as with all five Simpsons here.
Read on the day this page was built: $730 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.
| Pressure | 3600 PSI at 2.5 GPM — 9000 cleaning units |
|---|---|
| Frame | Aircraft grade aluminum, powder-coated — see the FAQ on the weight |
| Hose | 35 feet, Morflex 5/16 inch, non-marring and abrasion-resistant |
| Gun | A professional QC spray gun with a SAFETY LOCK-OUT — one of only two here |
| Pump | AAA triplex plunger with an integrated unloader, thermal relief and PowerBoost |
| Engine | Honda GX200 with low-oil shutdown |
| Tires | 10 inch premium pneumatic |
| Weight | 78 lb per the bullet, 35,834 g (1264 oz) per the catalog — a pound MORE than the steel PS3228 |
| Dimensions | 21 × 24 × 34 inches, published |
| Nozzles | Five quick-connect tips |
| PowerBoost | Claimed to deliver higher pressure at the nozzle, with no explanation |
| Compliance | 49-state — not for sale in California |
| Warranty | Not published |
| Amazon reference | B00U30KGXI |
| EAN | 0879399001352 |
The frame may be; the machine is not. The bullet says the "Aircraft grade aluminum frame with powder-coated finish is easy to assemble and resists corrosion", and the description says it "cuts weight". Then it publishes 78 lb. The steel-framed Simpson PS3228 at $659 publishes 77 lb, and the steel-framed PS61002 at $639.99 publishes 74 lb — both with the same Honda GX200, the same AAA triplex pump and the same 2.5 GPM. So the aluminum machine is one to four pounds heavier than the steel ones. Two differences could account for it: this delivers 3600 PSI rather than 3300, which usually means a larger pump, and it carries a 35 foot hose rather than 25, which is ten extra feet of braided high-pressure line. Both add weight. The catalog figures track the bullets closely — 35,834 g (1264 oz) here against 33,929 g (1196.8 oz) for the PS3228 — so the numbers are consistent with each other and inconsistent with the marketing. What aluminum genuinely buys is corrosion resistance: a powder-coated steel frame rusts from any chip, and aluminum does not.
Three hundred PSI, ten feet of hose, a frame that cannot rust, and a gun that locks. Output goes from 3300 PSI / 2.5 GPM to 3600 / 2.5 — in cleaning units, 8250 to 9000, about nine per cent. The hose goes from 25 feet to 35, which is the difference between moving the machine twice round a house and once. The frame changes from welded powder-coated steel to aircraft grade aluminum, which matters in a damp or coastal garage. And the gun gains a safety lock-out, which the PS3228 does not have — only this and the ALH4240 at $1448.99 publish one on this shelf. What stays the same: the Honda GX200 with low-oil shutdown, the AAA triplex plunger pump with integrated unloader and thermal relief, the 5/16 inch Morflex hose, the 10 inch pneumatic tires, the threaded M22 connection, the five tips, the 16 inch wand, and the 21 × 24 × 34 inch footprint. So the money buys a meaningful but not transformative step. The PowerSmart at $259.99 delivers 9500 cleaning units with PWMA-certified figures — more output for a third of the price, on a sealed pump with no thermal relief.
Because the trigger is the only thing between a 3600 PSI jet and whatever is in front of it, and only two listings on this shelf publish a lock. This gives a "Professional QC spray gun with safety lock-out"; the ALH4240 at $1448.99 gives the same. The other nine — including the PS61002 and PS3228 with their "rear-load M22 pressure washer gun", the DeWalt with its "ergonomic spray gun", and all three Westinghouse machines with a "lightweight spray gun" — publish none. What it prevents: a gun set down on a frame or a step with the engine running, where a foot, a hose or a dog can pull the trigger. At 3600 PSI with the 0° tip fitted — which every machine on this shelf supplies — that jet will cut skin. Nothing in any of these eleven listings warns about the 0° tip, and Simpson describes its five-tip set as covering "tasks from stripping paint to car cleaning", which is exactly what the 0° and 15° are for. A lock-out is a two-dollar part doing the most important job on the machine.
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 | Hose | Pump | Engine | Tires |
|---|---|---|---|---|---|
| Simpson 60689 | $730 | 35 feet, Morflex 5/16 inch, non-marring and abrasion-resistant | AAA triplex plunger with an integrated unloader, thermal relief and PowerBoost | Honda GX200 with low-oil shutdown | 10 inch premium pneumatic |
| SIMPSON PS3228 | $660 | 5/16 inch by 25 foot Morflex — the bore is published, which its twin omits | Maintenance-free AAA triplex plunger with an integrated unloader and thermal relief | Honda GX200 with low-oil shutdown | 10 inch premium pneumatic |
| Simpson PS61002-S | $640 | 25 foot Morflex, kink and abrasion-resistant, non-marring polyurethane jacket | AAA triplex plunger with an integrated unloader and thermal relief | Honda GX200 with low-oil shutdown | 10 inch premium pneumatic |
| Simpson PS60869 | $830 | 3/8 inch by 50 foot Monster, kink and abrasion-resistant | AAA industrial triplex plunger with thermal relief, direct drive | Honda GX270 — a real Honda, where the dearer CRX uses a house engine | 13 inch premium pneumatic |
Details checked on October 4, 2026.
A coastal or damp garage, where a frame that cannot rust earns its place
Amazon reports what buyers took in the month before this page was last checked: at least 100.
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
