Clean It Up
UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: Nick_Thompson on June 29, 2022, 10:24:17 am
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Hi,
What's the highest tds reading you have used without any spotting?
Nick
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Hi,
What's the highest tds reading you have used without any spotting?
Nick
Mine is 008. ATM.
Been like that 3 years no di had no call backs regular 6 weekly and one offs
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I don't know but I've plenty of issues using 3/4tds resulting in spotting.
So rather than thinking what can I get away with I just use zero then at least if I do get any issues I know it's not the water.
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0 - but then I believe the story I tell the customers.
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Mine is usually around 003-004. Been as high as 008, not aware of any spotting issues.
Really cannot be bothered to faff about with resin.
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40 last month. ???
I hadn’t realised my membrane had failed and resin too.
I got a call back (first time in about 5 years that I’ve had a quality complaint) and although it looked like water from a vent, I think the tds was the issue.
I got away with it for the rest of my work though.
Just get a 25 litre di vessel and a resin change becomes a yearly task.
My ro produces 000 or 001 though.
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10 max
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I used to be able to clean my own windows with tap water which was 029. I wouldn’t trust it on customers but it probably would have been fine.
These days I change when higher than 10.
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If it's below 10 I'm happy.
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0 - but then I believe the story I tell the customers.
Do you think the Zero parts per billion merchants believe their stories too?
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Hi,
What's the highest tds reading you have used without any spotting?
Nick
What I did is chose our lounge window which is large and gets the early morning sun as a 'test site.'
I filled a backpack with pure water and thoroughly washed and rinsed the window. The next day I checked the window - no spots. I added a little tap water to the backpack and checked the tds before washing and rinsing the window.
I found with our water at 3ppm I couldn't see any spotting on the dried window. I could, however, see very faint spots in the early morning sun with the water at 5ppm. . I doubt a customer would notice them, but to be sure, I never let my pure water tds rise above 1ppm.
There is no way I could get away with pure at 10ppm because the spots were clearly visible, and I guarantee a customer would notice them immediately.
This took time to accomplish. After each tds increase, I checked the window when dry and then cleaned it with pure water, so I started with a total clean piece of glass. This meant that the previous results couldn't interfere with or contaminate the next test.
I did this as some windies were reporting that they could clean with pure at a higher tds than 10ppm. I now know I can't.
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0 - but then I believe the story I tell the customers.
Do you think the Zero parts per billion merchants believe their stories too?
Lol. Is that still a thing?
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Hi,
What's the highest tds reading you have used without any spotting?
Nick
What I did is chose our lounge window which is large and gets the early morning sun as a 'test site.'
I filled a backpack with pure water and thoroughly washed and rinsed the window. The next day I checked the window - no spots. I added a little tap water to the backpack and checked the tds before washing and rinsing the window.
I found with our water at 3ppm I couldn't see any spotting on the dried window. I could, however, see very faint spots in the early morning sun with the water at 5ppm. . I doubt a customer would notice them, but to be sure, I never let my pure water tds rise above 1ppm.
There is no way I could get away with pure at 10ppm because the spots were clearly visible, and I guarantee a customer would notice them immediately.
This took time to accomplish. After each tds increase, I checked the window when dry and then cleaned it with pure water, so I started with a total clean piece of glass. This meant that the previous results couldn't interfere with or contaminate the next test.
I did this as some windies were reporting that they could clean with pure at a higher tds than 10ppm. I now know I can't.
You may get different results from RO product water at 003 as opposed to getting 003 by mixing pure water with tap water.
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I always stick to zero although when my membrane was a goner , it did rise to 003 which made me nervous.
My lounge window is south facing and looks a mess after a couple of days - drives me mad
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I don't know but I've plenty of issues using 3/4tds resulting in spotting.
So rather than thinking what can I get away with I just use zero then at least if I do get any issues I know it's not the water.
More likely technique issue than TDS
015 is my limit - never had stopping from this level
had spotting on 032 when the resin went awol once - even then it was only a few properties out of 25 - hence I don't rely on resin - I just keep the RO membrane good and change that when required
Darran
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Hi,
What's the highest tds reading you have used without any spotting?
Nick
What I did is chose our lounge window which is large and gets the early morning sun as a 'test site.'
I filled a backpack with pure water and thoroughly washed and rinsed the window. The next day I checked the window - no spots. I added a little tap water to the backpack and checked the tds before washing and rinsing the window.
I found with our water at 3ppm I couldn't see any spotting on the dried window. I could, however, see very faint spots in the early morning sun with the water at 5ppm. . I doubt a customer would notice them, but to be sure, I never let my pure water tds rise above 1ppm.
There is no way I could get away with pure at 10ppm because the spots were clearly visible, and I guarantee a customer would notice them immediately.
This took time to accomplish. After each tds increase, I checked the window when dry and then cleaned it with pure water, so I started with a total clean piece of glass. This meant that the previous results couldn't interfere with or contaminate the next test.
I did this as some windies were reporting that they could clean with pure at a higher tds than 10ppm. I now know I can't.
Not one to argue with your wisdom Spruce - but there is a difference between water passed through an RO and adding tap water - if gone through the RO filters larger particles are out and the carbon block also removes chorine/floride which will also hang about on the glass
Darran
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I try to never go above 005 as i find sometimes i feel i have to rinse off a bit more to stop any chance of spotting, especially when the sun is right on the windows in the summer). I dont think customers would notice it the same in the winter, as it gets chance to run off, the suns not on it drying it out quickly and showing every mark on it, plus it often rains sooner than later anyway!.
I couldnt be bothered with the hassle of going back (only ever happened once or twice) IMO keeping the TDS down is better/more efficient for sure.
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Hi,
What's the highest tds reading you have used without any spotting?
Nick
What I did is chose our lounge window which is large and gets the early morning sun as a 'test site.'
I filled a backpack with pure water and thoroughly washed and rinsed the window. The next day I checked the window - no spots. I added a little tap water to the backpack and checked the tds before washing and rinsing the window.
I found with our water at 3ppm I couldn't see any spotting on the dried window. I could, however, see very faint spots in the early morning sun with the water at 5ppm. . I doubt a customer would notice them, but to be sure, I never let my pure water tds rise above 1ppm.
There is no way I could get away with pure at 10ppm because the spots were clearly visible, and I guarantee a customer would notice them immediately.
This took time to accomplish. After each tds increase, I checked the window when dry and then cleaned it with pure water, so I started with a total clean piece of glass. This meant that the previous results couldn't interfere with or contaminate the next test.
I did this as some windies were reporting that they could clean with pure at a higher tds than 10ppm. I now know I can't.
Not one to argue with your wisdom Spruce - but there is a difference between water passed through an RO and adding tap water - if gone through the RO filters larger particles are out and the carbon block also removes chorine/floride which will also hang about on the glass
Darran
You could have a point there Darran. I'm going to have to stew on this one. ;D
The trouble is that my r/o takes my water down to 3ppm, so I can't use a higher ppm pure than that as a test unless I interfere with my pure to waste ratio.
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Test at 003 - it’s a good starting point 😃
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Test at 003 - it’s a good starting point 😃
My first r/o was supplied by Peter Fogwill. He said that I didn't need to use resin at 4ppm but wouldn't go higher than that. When pure reached 5ppm, I needed to use resin to polish my water off.
Anyway, I go through a 25 litre bag of resin every 4 years, so keeping my water at 0 ppm isn't a major expense.
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so after reading this thread , I decided to experiment , and no better time than during this hot weather.
I am DI only as my tap TDS is hovering around 50 and this is the caser for the area my customers are based .
so I have been cleaning windows with a tds of 25 to 30 for about two weeks .
I have done this by filling a part of my tank with tap water, and then filling the rest with pure 00 TDS
As the windows have been drying extremely quickly , on most houses I have been able to guage the results .
as of yet I have had no issues apart from a first clean . ( I carry a few barrels off 000 TDS just incase.
One thing I will add is that I have a good flow rate to be confident in the rinsing.
This has been just experimenting, I wont be continuing like this . but it has given me confidence that 30 TDS is workable
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While workable - and can achieve good results your working on the upper tolerance of acceptable - you give yourself very little room for error/bad drying
but well done for going out and experimenting
Darran
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058 with zero spotting!
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058 with zero spotting!
Do you have a white stick 😂😂😂😂