Understanding PSI: Key to Effective Pressure Washing

A pressure washer spraying on wooden surface to clean. Wiley's Pressure Washing Logo on a blue block with the title: Understanding PSI: Key to Effective Pressure Washing.

When it comes to pressure washing, understanding PSI—short for pounds per square inch—is key to achieving the perfect clean without causing damage. It measures the water pressure delivered by a pressure washer, and it plays a critical role in determining how effective and safe the cleaning process will be. Too much pressure can harm delicate…

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