Power/pressure washers: GPM & PSI - are they accurate, what is more important
"Pete C." wrote in message
Pressure is in the hoses and lines up to the nozzle, there is no
pressure after the nozzle, only velocity.
So when the water hits the surface, there is no pressure against it? You
can hold your hand against it and feel nothing?
Velocity is the rate of change of position, pressure is what you feel.
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