[edd]

HI ALL HAPPY NEW YEAR
 
 my ppm is ooo up till xmas then for some reason over the week off it went up to 34ppm ok.....
so we changed the resin for a bag of purlite mb400 [ which is what we always use ]  and before
the windows never sheeted down down like others discribe , and now nearly all windows sheet
down WHY IS THIS??? I am not saying its a better result its just easier to do and looks better when
finished you know not all drops of water everywhere
1. new filters every 50000 litres
2.tds always 000 ppm
3 ro backflushed daily
4 same resin and from same place
any help on this strange one would help Edd

[Jeff Brimble]

Has the Purolite formula been changed even though it says mb400 on the bag ?

[NWH]

Maybe it`s more virgin than normal.

[Village Gleam]

Are you saying TDS is 34 and you don't understand why, but this is doing a better job than 000 because the water now sheets on all windows?

Maybe Someones put  squirt of dishwashing rinsing agent into your tank?

[Jeff Brimble]

"Rinse aid" was just one of the solutions that we found failed to solve the spotting problem. 

[NWH]

Listen Jeff now i know you`ve tried all different ways of eliminating spotting etc and have trialed and errored most avenues and have more experience than most but i have to tell you,over the last couple of weeks i have added a whiskey glass full of that iospranol stuff to 500ltrs and i have to tell you the results are far far better than using just pure water only,no joke there is no spotting it cleans better and leaves a shine like never before,from now on i`m using it all the time.

[L.Doubtfire - The Blade Runner]

Jeff,how do you find untreated rainwater in general compared to the tap water that had gone thru` your RO unit? Did you ever treat water from say 34 ppm down to
Zero using just resin,Dowex,Purlite or whatever? The original poster( sorry forgotten
Your name,I apolgise) is saying in a nutshell that Purlite resin is changing hydraphobic glass into hydraphilc glass.Perhaps the makers are putting something into the beads to make it happen,and I don`t mean windscreen fluid !!!!!!!!!!!!!!
I wonder if were` on the verge of discovering the holy grail of window cleaning??
i.e. To make all those pesky window sheet instead of bead??  If only!!!!!!

Lewis Doubtfire  Gleem Clean ( The blade Runner )

[Jeff Brimble]

NWH Thats a great result and although we used Iso for antfreeze we never tried it for the sheeting trick so well done. Good research over a period of time. I had noticed you where doing it from posts on anotherforums. (I just didnt want peoples expectancys raised for rinseaid.)

[NWH]

Have you not noticed better results when using the antifreeze Jeff,maybe you didn`t use enough i went the whole hog and put in quiet a bit.

[Jeff Brimble]

Lewis, ever since I started I have always used RO and had probs with spotting even with 000tds. What your suggesting - that rainwater helps the glass sheet is a possibility. I do find that the rainwater is softer and wonder if its something to do with lets say a "static charge" or process that the RO water goes through, that the rainwater doesnt ?

[Jeff Brimble]

No NWH but as I said its one trick we missed. I suggested 10ml per 10L as an antifreeze.

[L.Doubtfire - The Blade Runner]

Nigel,just can`t bring it to mind who it was,but in another thread,somewhere
The fella said that before being a window cleaner his job entailed working
With water combined with isopropanol . He said the isopropanol soon evaporated
And had no bearing on it.I wonder if what your experiencing is some kind of
Chemical reaction?

[Village Gleam]

Vedd uses hot water, that hot that he is reputed to crack windows. Recently the weather, and probably the glass, has been abnormally cold.

Given Brownian movement ect maybe it's just the temp difference.

[L.Doubtfire - The Blade Runner]

Wonder if this is end of `thread`.Mr.Solubility is possibly right.
A new `thread` might be the `way to go`.  i.e.` Hot versus Cold`
For sheeting glass.Also Jeff,don`t forget the electric charge with
Your pump in ya backpack as well as the RO.When ya think the
Water goes thru` quite a bit of processing before it reaches the
Window glass !

Lewis Doubtfire

[Wayne Thomas]

Wonder if this is end of `thread`.Mr.Solubility is possibly right.
A new `thread` might be the `way to go`.  i.e.` Hot versus Cold`
For sheeting glass.Also Jeff,don`t forget the electric charge with
Your pump in ya backpack as well as the RO.When ya think the
Water goes thru` quite a bit of processing before it reaches the
Window glass !

Lewis Doubtfire

With regards to using hot water to minimise globular spots left on hydrophobic glass. I've had far less spotting on hydrophobic glass using hot water rather than cold. I have the odd window that doesn't sheet very well and it tends to be strengthened glass patio doors, especially if they have a tinted covering. Hot water definitely sheets windows easier than using cold water.

[Jeff Brimble]

Wayne, at freezing, what temp is your "hot"water ?
just a note Iso is a "wetting agent"

[NWH]

Lewis using that stuff definetly makes the window`s look cleaner i have no doubt,i have used it now for over 3 weeks,i used it originally for cold weather but i`m now using it all the time cold or not.I`ve been using WFP for long enough now to see the difference when adding the isopropanol, and it does make the window`s appear cleaner after drying,don`t ask me why.

[Jeff Brimble]

Lots of things to think about, one I noticed was that between cleans there seems to be a build up of something - lets say its a wax, and that this wax needs a good scrub to break it up to get the sheet effect. Maybe and I aint trying to side step, maybe the alchohol (also a solvent)helps break that film/wax/dirt quicker and better.
The other famous spirit for cleaning as we all know is Meths and that leaves glass Squeeky Clean

[Wayne Thomas]

Wayne, at freezing, what temp is your "hot"water ?
just a note Iso is a "wetting agent"

Hello Jeff,
 
My Omnipole hot water unit heats the water to a set 60 Celsius.
I use hot water on double glazed glass and warm to tepid on single glazing and old delicate, thin glass. I am always aware of thermal shock, i.e. using very hot water on thin, old glass in very cold temperatures. In the summer I don't worry about the glass.

If it's near freezing, what I'll do is preheat my van baffled tank to tepid to warm-ish.
I regulate how cold I want to make the water by leaving a much longer than needed length of unwound hose on the ground so that some of the heat is dispersed through the hose which is lying on the very cold ground if I'm cleaning really thin, delicate old glass.
I try to leave cleaning really old properties 'til around lunch time when the glass has warmed from the sun and air temperature rising.
If I'm cleaning double glazing then all I do is turn the heater unit on and just draw the already pre warmed water through the heater so that it comes out at my pole nice and hot. I always try, when and where possible, to do these type of houses first on extremely cold mornings and save the old buildings to around mid-day if possible.
It's not always possible to work the way I do, but with careful planning of schedule it's a routine I've got into now to minmise cracking any glass. My problem is I clean a lot of old Victorian and even some Edwardian properties. The good thing is that they sheet unbelievably easy and are very quick to clean because of the sheeting.

[Jeff Brimble]

Thanks for that good reply,
So by tepid do you mean (would you guess) approx 25 degrees temp above the freezing glass ?

Pre 1967 "tin "float glass generally sheeted great, its after that when the Double glazing industry started messing about with fancy polishes and we got "Oil floated" glass etc that I noticed spotting problems. I have long been building up my round concentrating on sheeting glass.