On Sun, 13 Jan 2013 18:14:46 +0000 (UTC), "Danny D."
wrote:

On Sun, 13 Jan 2013 05:14:29 -0500, Stormin Mormon wrote:

I've worked at the end of 300 feet of hose, cleaning a roof top AC at a
mall, and it wasn't too awful bad.

Luckily this situation would have the pressure washer at the bottom of
the ravine a few hundred fee down the hill, which is a good hundred feet
or so vertically BELOW the hose bib at the house.

It still might work, depending on the pressure at the bib. 100' is
about 40PSI, so you should have something left at the top. It is
iffy, though. The most important thing is to make sure there is
enough volume that the washer doesn't dry up or overheat. I don't
think that takes much water.