Simpson CM61456-S - 3200 PSI 2.5 GPM 170cc Gas Pressure Washer
The Simpson CM61456-S is a gas-powered pressure washer offering a maximum water pressure of 3200 PSI and flow of 2.5 GPM. (Read full specs)
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Description
Zoom on the Simpson CM61456-S
In summary, the Simpson CM61456-S is a heavy duty, commercial pressure washer, which provides:
- spot cleaning of hard, unpainted surfaces, reaching high areas, and removing stubborn stains
- general cleaning of hard surfaces , washing vehicles, and preparing surfaces for painting
- gentle cleaning for sensitive surfaces, and wide coverage cleaning with low pressure
- applying detergents and cleaning agents, and rinsing off surfaces
Its power characteristics and design, its main features and all its additional features are presented ahead.
Power
Using a 170cc engine, its axial cam pump delivers a pressure of up to 3200 PSI (roughly 53 times more than a standard garden hose) and a flow of up to 2.5 GPM (values claimed by the manufacturer). When these values are taken together, they yield a cleaning power of 8000 Cleaning Units.
The engine of this gas-powered pressure washer is initiated by a classic pull-start mechanism.
Gasoline is stored in a fuel tank with a maximum capacity of 0.21 gallon.
Design & Handling
The Simpson CM61456-S's mobility is greatly enhanced by its hand truck design. The durable steel frame of the assembly ensures its longevity, providing stability and shielding internal components from damage, even in tough conditions. The handle adds to the CM61456-S convenience of transport.
At 50 lbs, this unit strikes a balance between portability and stability, making it easy for most users to handle. Its 170cc engine and steel frame account for a good chunk of that weight. However, with its two 12" never-flat wheels, the CM61456-S is easy to maneuver.
Main Features
Along with the Simpson CM61456-S itself, the package also includes a spray gun, a wand, a pressure hose, 5 nozzles and a detergent injection feature, which are discussed in further detail below.
- Soap injection: Detergent is stored in a dedicated tank. Attachment of a soap nozzle prompts the pressure washer to automatically introduce and blend the detergent with the water.
- Pressure hose: When not in use, the unit allows for tidy storage of the included 25 ft ⌀1/4" high-pressure hose using a set of convenient hooks, ensuring convenient organization.
- Spray gun and wand: A side hook enables you to easily store the included classic ergonomic spray gun and its wand.
- Nozzles: Below, you'll find a table outlining the 5 included nozzles and their recommended surfaces.
0° | 15° | 40° | Soap | Turbo | |
|---|---|---|---|---|---|
| Concrete, brick, masonry | |||||
| Siding, gutters, house | |||||
| Fencing, deck, patio | |||||
| Lawn equipment, boat, RV |
Please be aware: The shapes of the depicted nozzles are for illustration purposes and may differ. Symbols utilized include a indicating 'Not recommended,' a for 'Suitable,' and an for 'Use with caution.'
Other Features
- Onboard storage: Stay prepared for any job with Simpson CM61456-S's handy storage area, which allows you to neatly store any nozzles and accessories which you may need for the job.
- Safety: Safety of operation is enhanced by a trigger lock mechanism (which prevents accidental operation), a thermal relief valve (which helps to prevent internal pump damage) and a low oil protection.
- Accessories: On top of an owner's manual (opens in a new tab) and the usual documentation to get you swiftly started, the Simpson CM61456-S also comes with spray gun, pressure hose, nozzle cleaner, wand and funnel.
The Simpson CM61456-S's performance versus other pressure washers
The following charts are provided to give you an idea of how the key specs of the Simpson CM61456-S compare to similarly priced pressure washers.
- Capable of delivering a maximum pressure of 3200 PSI, the Simpson CM61456-S is one of the gas-powered products known for providing higher-than-average water pressure, within the $300 to $400 price range. If you're seeking the strongest water stream, look no further than the Simpson CM61083, which delivers an impressive 3400 PSI.
- Featuring a flow rate of 2.5 GPM, this washer sits at an average level of water volume within the previously mentioned price range. For those prioritizing effective debris rinsing, one of the top products in this price range is the WEN PW224G, offering a high flow rate of 2.7 GPM.
- At 8000 Cleaning Units (PSI X GPM) in total, the CM61456-S emerges as one of the more efficient devices available at its price point. If the highest overall cleaning power is a priority, the Westinghouse WPX3400 and its 8840 Cleaning Units are notable for their higher potential cleaning efficiency compared to units in the same price range.
Price comparison
As you can see from these interactive charts, when compared to other gas-powered washers between 8000 and 8500 Cleaning Units, the Simpson CM61456-S is on the cheap side of the price range.
It can therefore be a really good buy if you're looking to acquire a budget pressure washer.
The bottom line
- Inexpensive
- 5 year (limited) warranty
- Good range of nozzles included
- Onboard storage
- Several security features
- High PSI for the price
- High CU for the price
- Decent GPM for the price
The Simpson CM61456-S doesn't have any notably low specs.
Features and Specifications
| Fuel | Gas-Powered |
|---|---|
| Engine | 170cc OHV 4-stroke |
| Pump | OEM Technologies™ Axial Cam |
| Water | Cold (104°F max.) |
| PSI | 3200 |
| GPM | 2.5 |
| Cleaning Units | 8000 |
| Frame | Steel |
|---|---|
| Handling | Hand Truck |
| Wheels | 2 wheels, ⌀12", never flat |
| Weight | 50 lbs |
| Dimensions | Approx. 22 x 18 x 35.8 in (D x W x H) |
| Hose storage | Hooks |
| Soap injection | Yes |
|---|---|
| Soap tank | Yes |
| Nozzles | 0°, 15°, 40°, Soap, Turbo |
| Quick connect nozzles | Yes |
| Onboard storage | Yes |
| Hose | 25 ft, ⌀1/4 |
| Security | Low oil, trigger lock and thermal relief valve |
|---|---|
| Emissions | EPA |
| Included accessories | Funnel, nozzle cleaner, wand, spray gun, high pressure hose, 5 nozzles |
| Warranty | 5 years |
| Series | Clean Machine |
| UPC | 636893409011 |
We've taken extra care to research and verify each of the specifications above. That said, occasional mistakes or omissions are still possible. If you spot any missing or inaccurate information, feel free to suggest a correction so we can address it.
About Simpson
Simpson has over 50 years of experience making quality products for the outdoor power equipment industry. Part of the FNA Group based in Pleasant Prairie, Wisconsin since 2006, they are a vertically-integrated company, meaning most of the parts and accessories are manufactured and assembled by them. Their manufacturing facilities are international, but their gas-powered pressure washers are made in the USA. With the company motto "Driven by Performance", Simpson continues to offer a great variety of pressure-washing systems for the homeowner or the professional contractor.
Warranty Information
The Simpson CM61456-S is covered under a warranty for up to 5 years. This warranty may be limited and may not cover all parts of the unit.
For more information about the warranty of Simpson pressure washers, please contact the Simpson Customer Support: 1-877-362-4271.

