"A. Baum" wrote in message
news
On Mon, 20 Sep 2010 07:32:12 -0700, Steve B wrote:

Does a power washer have to have pressurized water on the inlet, or will
it draw from a tank source?

Steve

Needs a certain amount of pressure usually 40PSI for full output.
I ran into this situation this summer with a partially clogged outside
spigot not delivering me constant pressure while power washing a driveway
with a 2700 PSI power washer. You could tell that the pressure on the gun
was going up and down. Sometimes even pumping virtually nothing. I had to
pull the packing nut off the spigot and remove and clean mineral buildup
on the valve components.

It works fine, there are just times when I want to use it where there is no
spigot. It is a Karcher with a Honda engine.

Steve