Portable pressure washers come in different forms. High-quality pressure washers feature stainless steel spray wands with brass quick connectors to swap out the spray tips. Entry-level units often have a plastic wand with a built-in adjustable plastic spray tip. Light-duty electric washers use plastic components that would not hold up to the intense pressure produced by heavy-duty machines. The connectors between the spray gun and pressure hose and between the spray gun and the wand are usually threaded brass, but they also may be heavy-duty metal quick connectors or light-duty plastic components. The spray gun body is typically plastic, with either a molded or lever-style triggering mechanism. Pressure washer spray wands are not universal. Raising water pressure from 2,000 to 3,000 psi increases the distance the user can hold the spray tip from a surface. The psi rating indicates a pressure washer’s ability to lift stuck-on dirt from a surface. Water pressure is measured in pounds per square inch (psi), and it’s the strength of the water stream the washer creates. Increasing the flow from 1.0 to 2.0 GPM flushes soil from a surface twice as fast. The GPM rating is a good indicator of a pressure washer’s power.
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