Clean It Up
UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: shina on June 04, 2014, 10:47:47 pm
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My tds is now 003 to 004 for every 500ltr.
I have a 300 a day system and change the resin after each time as I always have. I have flushed the system and done everything possible so just cant work it out. I hate working with water that is not 100%. The tds before the di is around 030 on average and the resin does the rest.
Any ideas as I'm lost.
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If the water tds figure after r/o process has not changed, the problem must be with the di resin, or in whatever plumbing you have after the r/o.
If the water tds figure after the r/o process has changed, then the problem is with the r/o, something i am currently experiencing myself at the moment!.
Either way, i wouldn't worry about a figure of 003-004.
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If the water tds figure after r/o process has not changed, the problem must be with the di resin, or in whatever plumbing you have after the r/o.
If the water tds figure after the r/o process has changed, then the problem is with the r/o, something i am currently experiencing myself at the moment!.
Either way, i wouldn't worry about a figure of 003-004.
The r/o does the job of bringing tds down from 370 to 030. The d/I does bring it down to 000 but not for very long and I am using enough resin. The system came with Resin and the results were the same if I used their resin or mine.
I also have a 80psi pump which is supposed to help. You get water faster but the results are the same whether you use it or not
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What is the size of the DI?
Have you considered double DI?
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What tds do you fellas work up to before possible spotting? Mine is at 007 at the min but results are still perfect. Must get the resin changed this weekend though!
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Don't be so OCD.
003 or 004 will still do the job.
Maybe your TDS meter is wrong.
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Maybe your TDS meter needs calibrating?? Just a thought. We usually let it go to 6-8 before changing it. Also give the DI canister a shake up it helps
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What resin are you using?
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Mine was stuck on 6ppm so I got a new meter, it's showing 0ppm on the new one
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Your not using unger resin by any chance?
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I have 3 tds meters and they all say the same. The di housing is the same size as the filter housing so should do 5oo litres easy. I am using the resin from Soap National the mixed bed virgin resin. I used this on my old system and had no problems and after my 500 litre tank is filled up I then change the resin, so I do go through a lot of it.
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If the water tds figure after r/o process has not changed, the problem must be with the di resin, or in whatever plumbing you have after the r/o.
If the water tds figure after the r/o process has changed, then the problem is with the r/o, something i am currently experiencing myself at the moment!.
Either way, i wouldn't worry about a figure of 003-004.
The r/o does the job of bringing tds down from 370 to 030. The d/I does bring it down to 000 but not for very long and I am using enough resin. The system came with Resin and the results were the same if I used their resin or mine.
I also have a 80psi pump which is supposed to help. You get water faster but the results are the same whether you use it or not
If your r/o is only achieving a pure tds of 30 from 370 input, then I would say you need to change your membranes.
These r/o's should be running at between 97 to 99% efficiency. Your r/o is only working at an efficiency of 81%. At 98% efficiency your pure tds after r/o should be about 7 to 8 meaning that your tiny resin canister will last longer.
Whilst I would suggest a bigger di vessel, my first priority would be to replace the membranes. I would start by trying to identify if you just have one faulty membrane by taking individual readings from each output.
I would also consider replacing the 100GPD membranes with 150GPD membranes which will give you more water. Whatever you decide, you should also replace the inline waste restrictor (if you have one) with a new one each time you replace membranes.
And don't forget, you need to replace prefilters regularily. The Carbon block filter is the most important, as it removes chlorine. Chlorine that escapes through the carbon filter causes premature membrane failure.
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I will give it a try, but there is a cost involved in this and from what I have been reading on here most seem to allow anything below 10 tds. So if I have 003 and this is supposed to be ok then I can leave the membranes a bit longer.
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I will give it a try, but there is a cost involved in this and from what I have been reading on here most seem to allow anything below 10 tds. So if I have 003 and this is supposed to be ok then I can leave the membranes a bit longer.
Yes, but you are paying more in resin because your RO output TDS is very high.
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Haven't heard the zero parts per billion boys lately ...