Dave Liquorice wrote:
Following on from my how to strip/clean outside walls of flakey paint
I had a play with my small domestic PW and that removed about 90% of
the paint without too much bother using the rotating "pulse" jet. The
other lances I have didn't really shift anything.

The book for this PW says 80 bar working and 5.5l/min. How much more
effective is a more commercial one of the sort one might hire, say
120bar 11l/min, be in comparison?

The cleaning effect is a combination of pressure & flow. 80 bar @ 5.5 lpm
goves a cleaning efect of 0.73.

120 bar @ 11 lpm gives a cleaning effect of 2.2, so nearly 3 times the
cleaning power.

Do you get a choice of lance with a hire PW ie normal fan type or one
of these rotating pulse things?

Its called a 'Turbo' lance. Karcher call theirs a Dirtblaster, Alto a
Tornado.

Depends on the hire shop & make of machine. A 'Turbo' lance will increase
impact pressure considerably - as much as 6 fold.

http://wiki.diyfaq.org.uk/index.php?...ure_washer_FAQ

--
Dave - The Medway Handyman
www.medwayhandyman.co.uk