Pressure washing uses high-pressure water (typically 2,000-4,000 PSI) at ambient temperature to blast dirt, grime, paint, and stains from hard surfaces. It is most effective on concrete, brick, and stone where the surface can withstand the force. Pressure washing is distinct from soft washing (low pressure + chemicals) and power washing (high pressure + heated water). Incorrect pressure settings or nozzle selection can damage surfaces.
A technician uses a 4,000 PSI pressure washer with a surface cleaner attachment to strip oil stains and tire marks from a commercial parking garage, moving in overlapping passes to avoid striping.
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