It sprays with an impressive 3,200 PSI at 2.5 GPM—powerful enough ... cleaning algae-covered walls, you need the Simpson PowerShot gas pressure washer. This beast delivers a whopping 4,000 ...
A combination of pressure, measured in pounds per square inch (psi), and flow ... About The Simpson CM61227 is part of the Pressure Washers test program at Consumer Reports.
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