[Marc Stock]

I prefer to run DI in van than store DI water in tank and ill tell you why.

DI water stored for a period of time in a tank that is not sealed from the atmosphere doesn't stay in its pure state for long. On top of this, you are wasting resin up by purifying water that's just going to sit there and osmose back to an unpure state.

By using the DI system on demand from a tank, not only are you using your resin much more efficiently the DI water that is being produced is the highest quality it can possibly be as there is no time for the water to sit there and osmose with the atmosphere.



 

[Jakey boy]

So water in the tank will rise in tds if left?? Surely this would take a long long time?! Also, how can de ironised water re ironise?

[Marc Stock]

If the tank isn't sealed from the atmosphere (which it can't be as if it was 100% sealed the pump wouldn't be able to pump the water very well) the free ions in the air will react with the water and eventually pull up the tds as the ions would be attracted to the water making its purity less.  I don't know how long it would take, but my point is to be 100% sure that your di water is as good as it can possibly be it's best to produce it on demand.

[SeanK]

So water in the tank will rise in tds if left?? Surely this would take a long long time?! Also, how can de ironised water re ironise?

The water has been filtered, for the tds to rise again you need to put back what has been taken out, with the small vent in the tank to let the pump flow it would take forever for the pollution in the air to get into the tank and cause a tds rise.

[richard groves]

So water in the tank will rise in tds if left?? Surely this would take a long long time?! Also, how can de ironised water re ironise?

The water has been filtered, for the tds to rise again you need to put back what has been taken out, with the small vent in the tank to let the pump flow it would take forever for the pollution in the air to get into the tank and cause a tds rise.

I tend to agree with this statement, and even if it did , it would not be enough to worry about.

[Shane sharples]

I filled a water butt up in the garden full of pure water, long story cut short I didn't need the water from there ( as I stored it in the garage in another container)
Anyways, when I eventually could be bothered emptying it, about a month later, I checked the tds - bearing in mind it was outside, the tds was still 000ppm , so in the back of your van , I should think it's a VERY long time b4 it rises to even 001ppm

[Smudger]

If the tank isn't sealed from the atmosphere (which it can't be as if it was 100% sealed the pump wouldn't be able to pump the water very well) the free ions in the air will react with the water and eventually pull up the tds as the ions would be attracted to the water making its purity less.  I don't know how long it would take, but my point is to be 100% sure that your di water is as good as it can possibly be it's best to produce it on demand.

Could you please provide a link for this information - thx

Darran

[Smurf]

If you're happy doing it that way then that's all what counts.

[the king]

i have di out of my van and my water is allways 000 even if i fill my van tank an only use half in a day and then refill its allways 000 even if left 3 days its still 000, i think this pollution  thing is a load of dung and wont affect us if u left it a month in there maby it would rase a bit but no way would it reach 010 tds not in a million years an we all no 010 will still clean spot free, i dont put di in van cos it takes the strain off my pump an battery , also one less thing to freeze in winter,also one less thing to leek water in van,also 1 less thing in van to save space, i slow fill my tank so it uses all the resin an dont wast any

[dazmond]

If the tank isn't sealed from the atmosphere (which it can't be as if it was 100% sealed the pump wouldn't be able to pump the water very well) the free ions in the air will react with the water and eventually pull up the tds as the ions would be attracted to the water making its purity less.  I don't know how long it would take, but my point is to be 100% sure that your di water is as good as it can possibly be it's best to produce it on demand.

sorry marc this info is incorrect.

ive had purified water sitting in 25L barrels for over 6 months before now(DI only)and the tds was still 000.

on topic i purify straight into my tank(takes around an hour 500L,DI only)as ive always done it this way plus i dont want DI vessels taking up space in the van.

[Walter Mitty]

My only concern would be water laying around a long time when the teperature is high enough to increase legionella to a level where water spray might cause a health problem - or even death.  I've never verified this but 20 degrees for two weeks is meant to be able to achieve that.

[EandM]

I have twin static DI units without RO and find that the resin produces 000 ppm for only about six weeks. If I then shake the two DI units the reading returns to 000 ppm. I carry a smaller, third DI unit on the truck to ensure 000 ppm and find that the constant movement of the vehicle optimizes the Resin Usage. I've tried running with and without the on board DI and the only thing I can say is that my pump runs at a much more constant rate and seems less prone to air bubbles due to the ' storage ' properties of the on board DI.

[Marc Stock]

If the tank isn't sealed from the atmosphere (which it can't be as if it was 100% sealed the pump wouldn't be able to pump the water very well) the free ions in the air will react with the water and eventually pull up the tds as the ions would be attracted to the water making its purity less.  I don't know how long it would take, but my point is to be 100% sure that your di water is as good as it can possibly be it's best to produce it on demand.

sorry marc this info is incorrect.

ive had purified water sitting in 25L barrels for over 6 months before now(DI only)and the tds was still 000.

on topic i purify straight into my tank(takes around an hour 500L,DI only)as ive always done it this way plus i dont want DI vessels taking up space in the van.

Ah ok i stand corrected.

I was always led to believe otherwise.