cjt wrote:

Some Guy wrote:

-snip-
Your answer should not include "it depends on what you want to wash".

I want to know if a washer that does 2 gpm @ 2000 psi has only half the
"cleaning power" as one that can do 4 gpm at 4000 psi (ie does the
cleaning power scale linearly with these numbers, or geometrically or
exponentially).

IMHO -

If you focus the stream, the pressure indicates how intense that stream
will be. The GPM indicates how large an area you can clean per swath at
a particular pressure. So if your concern is cutting through tough
dirt in small areas, the pressure might be more interesting. If your
concern is covering large areas in a reasonable time, the GPM might be
what you want to look at.


In other words. . . . "It depends on what you want to wash".g

Jim