[Nick_Thompson]

Hi,

What's the highest tds reading you have used without any spotting?

Nick

[M.c.s]

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

[Stoots]

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.

[Arnold Palmer]

0 - but then I believe the story I tell the customers.

[dd]

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.

[Jonny 87]

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.

[Ascjim]

10 max

[deeege]

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.

[AuRavelling79]

If it's below 10 I'm happy.

[AuRavelling79]

0 - but then I believe the story I tell the customers.

Do you think the Zero parts per billion merchants believe their stories too?

[Spruce]

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.

[Arnold Palmer]

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?

[dd]

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.

[Shrek]

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

[Smudger]

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

[Smudger]

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

[Steve H]

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.

[Spruce]

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.

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.

[Smudger]

Test at 003 - it’s a good starting point 😃

[Spruce]

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.