Choosing the right pressure washer can be confusing, especially when it comes to understanding PSI and GPM. PSI, or pounds per square inch, measures the pressure of the water, while GPM, or gallons per minute, indicates the flow rate. Together, these factors determine how effectively a pressure washer can clean different surfaces. This guide will help you make informed decisions for your cleaning projects.

Key highlights

• Define PSI and GPM
• Match power to tasks
• Avoid common buying mistakes

How to choose (and common mistakes)

When selecting a pressure washer, understanding PSI and GPM is crucial. Higher PSI means more cleaning power, ideal for tough stains on driveways or decks. GPM affects how quickly you can clean; higher GPM allows for faster work. A common mistake is focusing solely on PSI; an optimal balance of both PSI and GPM is essential for effective cleaning. For example, lower PSI with higher GPM might be better for delicate surfaces like cars. Always consider your specific cleaning needs and avoid overspending on features you won’t use.