Just spoke to a window cleaner who has just bought a backpack, the company
he went to up here in Scotland gave him the sales pitch the back pack would
do the job.
I told him I agree and disagree with this statement, yes backpack will do the
job but it is the slowest piece of equipment using WFP. ( due to constant
refilling )
The best piece of advise I had from Ionics

was to think big and go for a
large tank because if you buy a small one you will end up upgrading it.
How right they were, started out with trolley then 250l now looking for a
bigger tank.
Having seen a lot of topics on here where a lot of you have gone big was this
due to cash restraints or bad advise from whoever you bought your equipment
from.
I just wish some companies should be more realistic when selling these
products as a first off into wfp as the user will soon become disillusioned
with the end result.
To any newbie thinking about WFP my advise will be think big 650l if you have
the capital, otherwise like me in the long run you will have a garage with
the discarded trolley and backpack.
Doug