MEDIUM-DUTY pressure washers in the 1,800 to 2,000 PSI range can tackle bigger projects like large SUV's, RV's, siding and fencing, decks, garage floors and driveways.
There's no doubt that electric pressure washers from 1,300 to 2,300 psi can wash a concrete driveway, but it'll take longer. If you have a large driveway with lots of stains, you'll want more power to do the job faster.
For most cars, a psi between 1200 and 2200 is recommended. This range provides enough cleaning power to remove dirt and grime without damaging the car's paint or delicate surfaces.
PSI Pressure range for Different Surfaces
Different surfaces require different levels of PSI pressure. Generally, for most residential uses, an electric pressure washer (less than 2000 PSI) will suffice. Soft surfaces, such as decks and siding, usually require more cleaning power than harder surfaces such as driveways.
Mid-Range Power: 2,000 to 3,200 PSI
Those closer to 3,200 PSI work effectively on tough stains, too. Professionals use these for tough cleanup jobs in the shop.
Most electric pressure washers create 1300-1700 pounds per square inch of pressure (PSI) with a water flow of 1.5 gallons per minute (GPM), but experienced contractors recommend between 2000 and 3000 PSI and a flow of at least 2.5 GPM to clean dirty concrete effectively.
Concrete and asphalt require more cleaning power. You'll want to use the turbo nozzle on the 1600 PSI for hard-to-clean driveways, sidewalks, and patios as well as brick paving. For wood decks and painted surfaces, switch to the gentler 40-degree nozzle.
Choosing a Pressure Washer
Vinyl siding can withstand a powerful gas pressure washer (2,500-3,000 psi). Aluminum, stucco or soft-grain wood homes will do better with a less powerful washer (about 1,200-1,500 psi). Determine whether you will rent or buy your machine.
You should also never set your pressure washer above 2,200 psi when washing your car. 1,500 psi is really all you need to get a good deep clean; any pressure higher than that won't make a noticeable performance difference.
Concrete cleaning calls for powerful pressure washers featuring high pressure levels of 3000 PSI. However, if you will be using the power cleaner to maintain a range of surfaces in addition to concrete, choose one with adjustable pressure levels and set it to about 3000 PSI when you need to clean concrete.
The RYOBI 1800 PSI 1.2 GPM Electric Pressure Washer is the perfect powerful yet portable option to get the job done. This pressure washer is ideal for light duty applications like cleaning small driveways, sidewalks, decks, windows, patio furniture, campers, bikes, boats, and many other recreational applications.
Most electric pressure washers create 1300-1700 pounds per square inch of pressure (PSI) with a water flow of 1.5 gallons per minute (GPM), but experienced contractors recommend between 2000 and 3000 PSI and a flow of at least 2.5 GPM to clean dirty concrete effectively. …
Car washes typically blast out their liquid at 1,000 to 1,200 PSI, although pressures can go up to 2,200 in some situations. For this reason, along with the squirts of hot wax and slaps from towels, we do not recommend going through a car wash on foot.
For cleaning a wooden deck, you'll be best served by using the lowest pressure setting that's still effective. For soft woods like cedar or pine, this is usually about 500 to 600 psi. For harder woods, it can go up to 1200 to 1500 psi. Choose the right tip to use as well.
You'll need a power washer that provides a force of 3,000 PSI or more. The higher the pressure, the better and faster is the cleaning. If you want to use a lower pressure on certain surfaces, you can always attach a larger spray tip to it.
Tip: Only use low pressure when washing the exterior brick on your house. Pressure washing using 500 to 1000 PSI is recommended for cleaning masonry. Many professionals use 100 to 1500 PSI to avoid damage. 2,000 PSI is the absolute maximum, and that's for experienced pressure washers only.
Light Duty 1500-1900 PSI
For regular maintenance and light household cleaning jobs, a light-duty pressure washer will do. These feature PSI ranging from 1500 to 1900 and would be enough to get rid of dirt and mild stains.
For a typical car, use 1,200 to 1,900 PSI and 1.4 to 1.6 GPM for 1,900 to 2,800 cleaning units. Anything above risks the car's coating and paint.
Selecting a pressure washer with a range of 2,000 psi to 4,000 psi will give you the most effective power for removing peeling paint. With pressure washers, as with all power equipment, always wear protective goggles and closed-toe shoes.
Removing exterior paint requires a stronger stream of pressure than soft washing jobs such as cleaning a roof. Thus, you want to find a pressure washer that is up to the task. To properly strip old paint, you will need a pressure washer with a psi of 2000 or higher. Even setting the unit at 2000 won't do the trick.
Your pressure washer should have a minimum pressure rating of 3000 psi to effectively clean your sidewalk. There are a few situations where a higher pressure rating might be needed, but exterior cleaning experts all agree and recommend that 3000 psi is appropriate for residential use.
Softwood decking - For softwood decks like redwood or cedar, 1,200 PSI is enough pressure. Anything greater than that and you risk damaging or removing the wood, leaving behind a raised grain.
However, in general, a psi of 3000-4000 is commonly used for residential driveways.
Any machine capable of producing at least 1,500 pounds per square inch (psi) of pressure can clean concrete, but the work will go much faster if you choose a model producing 2,500 to 3,000 psi, like the gas-powered option below.
This 1600 psi 1.2 GPM electric pressure washer, as explained earlier, generates 1,600 Pounds Per Square Inch (which is in the recommended pressure range), and 1.2 Gallons Per Minute (ideal for washing cars, house exteriors, fences, garage floors, etc…).