[ztech]

after using wfp for past 6 months I can go through my work pretty fast using water pressure 30 psi at about 2 litres per minute .dont know if im wasting water at this rate or is this about right

[matt]

mine starts off at about 45 psi

then as the battery dies it goes down to about 30 ish

lunch time i change the battery (as i now have 2) and its back upto 45 psi

[matt]

i get about 4 houses (3 - 4 bed) out of 25 L

[c w window cleanin]

i get about 4 houses (3 - 4 bed) out of 25 L

is this doing the full house or just the tops? , also how many litres would you say it takes on your first clean?(first time using wfp) cheers mate

[c w window cleanin]

mine starts off at about 45 psi

then as the battery dies it goes down to about 30 ish

lunch time i change the battery (as i now have 2) and its back upto 45 psi

would you recommend me buying two batteries when i switch to a wfp trolley system-also what types would you recommend? cheers

[pjulk]

would you recommend me buying two batteries when i switch to a wfp trolley system-also what types would you recommend? cheers

It depends if you are going to make your own or buy a professional ready made system
if it's a DIY system It depends what type of batteries you are going for.
If you get one of those car jump start things for power you would need a couple.
But if you get a proper leisure battery or a system with a proper leisure battery it should last you all day no problem.

Paul

[matt]

i just do tops

i also use a "powerpack jump start"

i now have 2 of them, 1 does till lunch then the other till home time, though i did use just 1 for 5 months, but for the money, its worth a 2nd battery, and they will last longer as you are not draining them fully

http://www.d.co.uk/

for more details

[GMG]

i went out for the first time using wfp i was a little concerned at the flow rate found out it was putting out 2 litres a minute, this is with a 30 psi
pump, but was very inpressed with the result had to use alot of water as the frames were bad i tried it out on one of our contracts on the industrial estate (out of the way) . so now were are going to give canvas a go as from  2morrow  it will be interesting to see how we get on ,martin

[Ian_Giles]

My own system doesn't show me what pressure it is operating at, and as far as I know I cannot reduce or alter the pressure the pump operates at, though I can alter the flow rate.
I would expect to use somewhere between 15 and 20 litres (almost a full 25L on a first time clean) on an average 3 bed semi, actual time the pump is running is about 10 minutes so I guess I am using between 1.5L-2L per min.
The pump is rated at 60psi.
I also use fan jets in my brush, as against the needle jet. I'm going to get one of the Ionic domestic brushs, single filament. I know this uses the needle type jets, so I'll be interested in seeing what difference, if any, this makes.

The faster you have your flow rate, then the faster you can work, but you have it banging out too quickly and the brush filaments may not be in contact with the window long enough, or rather often enough..erm...to qualify that a little more...the amount of brush strokes over the glass.
Or you may spend longer brushing and using way more water than you actually need to
Finding the optimum flow rate for your own work rate is the hard part!
You could do a perfect job with a flow rate of less than a litre a minute, but you will have to spend a correspondingly longer time on each window.
So I think that if you are working fast then you need a good deal of skill and practice, otherwise you will end out with many windows spotting.

The balance between washing/scrubbing and rinsing + flow rate + speed of working and quality of the finshed job is the hard bit to get right.

The use of WFP is deceptive, it is so easy to do it's hard to see where the skill comes into it.
But I have seen work by others who just do not get it right, so much so that a couple of them have almost discarded their WFP systems and gone back to virtually full on traditional.
Some of you/us will be blazing away and wondering why so many windows are spotting
I still make mistakes now and then, it can take a couple of cleans on a particular house before you learn to get that balance right, that balance could well be very different on the next house

It's that learning curve isn't it, very steep to begin with, then it becomes like that hill somewhere in Scotland, it feels like you are going downhill, but it is still an incline! And you are still climbing it and not freewheeling down it.....unless you are complacent and are going backwards that is

Have a good day Y'all

Ian