How To Choose A Suitable PSI For Your Pressure Washers?

How To Choose A Suitable PSI For Your Pressure Washers?

While using a pressure washer, it's essential to consider the PSI reading. But how do you determine the PSI of a pressure washer? PSI (pounds per square inch) is a unit of measurement for water pressure. The requisite PSI depends on the strength of the chemical connection between the surfaces and the stains. For removing strongly bound discoloration, higher water pressure is a necessity. You can measure this water flow through gallons per minute (GPM).

All in all, the bonding between the surface and stain determines the required PSI for your particular needs. But in any case, let's take a closer look so you can make a confident decision.

What PSI Do I Need For My Pressure Washer?

Other than the chemical bonds, there are also other factors you have to consider. First of all, you need to decide between an electric or a gas-powered pressure washer. The former has a PSI range of 1300-1700, while the latter is between 2000-2800.

In addition to that, your project type also influences the final decision. And down below, you can check the PSI requirements for the most prevalent pressure washer projects.

  • Stripping paint: 4000 PSI
  • ATVs and boats: 3000 - 4000 PSI
  • Scooters and bikes: 1500 PSI
  • Car cleaning: 1200 - 1900 PSI
  • Concrete pavements: 3000 PSI
  • Asphalt pavements: 3000 - 4000 PSI
  • BBQ grills: 1500 - 4000 PSI

Once you know the PSI for the project you are working on, deciding on a Giraffe Tools pressure washer becomes effortless. However, some other units except for PSI also make a difference.

Are There Any Other Important Units for a Pressure Washer?

Other than PSI, you have cleaning power units (CPU) and gallons per minute (GPM).


The GPM is a significant marker to know how rapidly your pressure washer will cleanse and blast dirt away.

When you first start looking, you might think that pressure washers with lesser GPM are more efficient. But surprisingly, a higher GPM is typically preferable. , more water gets discharged per minute, allowing you to finish your pressure washing task sooner.


When you multiply a pressure washer's PSI with the GPM, the product you get is CPU. And similarly to the GPM, a higher CPU means better performance.

Does The Spray Hose Size Make A Difference?

Hoses for pressure washers are typically 0.25 inches in diameter for PSI 2700 and below. Other than that, 0.3-inch hoses are available for medium hoses. These are suitable for pressures ranging from 2700 to 3400 PSI. And last but not least, the 0.375 inches hose is the biggest and most prevalent.

When it concerns the pressure washer's life cycle, productivity, and optimum functionality, the hose surely matters. You'll want to ensure it is well-maintained and that you're using the ideal hose with the pressure washer.

Final Thoughts

Before purchasing a Giraffe Tools pressure washer, consider the necessary PSI for your project. But in addition to that, other factors are also of importance. All in all, make the most suitable decision in your case.