double di vessel

[gwindows]

Hi i am using double di and theres something not right with it which i canny put my finger on it .

Going through two di,s it comes out at 2ppm ! 

Now if i test the first di by itself it reads 2 ppm so its pulling from 80ish to 2 ppm!

Then if i test the second one by itself it also reads 2 ppm 

Th back one used to get up to about 40ppm before i needed to change the front one . Im confused any help , ideas 

Have given them a good shake , only making about 1200 litres a month , Surley it should last longer than this ! Only about 2 months since i changed the back one .

 

[wee man]

Are you changing them around when you change the resin? When mine gets to 1 I move the 2nd vessel into the first one's place and change the resin in the first one and put it in were the 2nd one was.

Sent using the Window Cleaning Forums mobile app

 

[gwindows]

Are you changing them around when you change the resin? When mine gets to 1 I move the 2nd vessel into the first one's place and change the resin in the first one and put it in were the 2nd one was.

Sent using the Window Cleaning Forums mobile app
 

When it comes through the front one at 2ppm  ,I change the back one as it is around the 40 ppm mark and it goes to the front  ,and the front one which reads 2ppm goes to the back ,so there is plenty life in the resin to pull it down before going through the new resin in the front .

I have always done it this way ,Its just the last two times the resin in both di,s reads the same, Its doing my heid in 

 

[wee man]

When it comes through the front one at 2ppm  ,I change the back one as it is around the 40 ppm mark and it goes to the front  ,and the front one which reads 2ppm goes to the back ,so there is plenty life in the resin to pull it down before going through the new resin in the front .
I have always done it this way ,Its just the last two times the resin in both di,s reads the same, Its doing my heid in 
 

I was getting confused as I put mine before the tank and by the sounds of it you put yours after the tank. I'm not to sure what else it could be mybe someone else will have had that problem before and will give you a answer.

Sent using the Window Cleaning Forums mobile app

 

[gwindows]

I just fill up   barrels  .But it has only started happening the last few months been fine for the last two years .

 

[P4dstar]

I just fill up   barrels  .But it has only started happening the last few months been fine for the last two years .
 

If you are measuring after it gets into the barrel (it doesn’t sound like you are but if) then the barrel may have become contaminated over time. Ensure whatever you are measuring the TDS in is clean and not contaminating and ruining your test. Ensure you have used multiple TDS monitors incase there is an issue with the monitor.
If none of that solves the issue check the O ring is in place correctly on both vessels and hasn’t perished in any way.
If that doesn’t solve it buy a small amount of resin from somewhere for your next change to see if it’s the actual resin that is causing the problem


Sent using the Window Cleaning Forums mobile app

 

[gwindows]

I check it when it comes out the pipe before it goes into the barrel always have ,The first di used to go up to about 40ppm before i had to change it , Might try resin from someone else see if its a dodgy batch.?

 

[P4dstar]

I check it when it comes out the pipe before it goes into the barrel always have ,The first di used to go up to about 40ppm before i had to change it , Might try resin from someone else see if its a dodgy batch.[emoji35]
 

Also have you checked your input TDS recently. Some of us have experienced an uplift in TDS due to the warm weather this year.

If your first DI is reading 40 it would keep rising from there. It probably only read 40 TDS for a few hundred litres of that. 80-40 means the resin is well and truly spent and just assisting the second DI to bring it down to 0 in theory. The higher the TDS rises the faster it rises also if that makes sense.

I’m assuming you fully empty the vessel and rinsed it fully, ideally with pure, when you changed it?

 

[wee man]

Also have you checked your input TDS recently. Some of us have experienced an uplift in TDS due to the warm weather this year.

If your first DI is reading 40 it would keep rising from there. It probably only read 40 TDS for a few hundred litres of that. 80-40 means the resin is well and truly spent and just assisting the second DI to bring it down to 0 in theory. The higher the TDS rises the faster it rises also if that makes sense.

I’m assuming you fully empty the vessel and rinsed it fully, ideally with pure, when you changed it?

That's very true as mine was 33 before the summer and went up to 70 buts it's come down this week too the low 50s.

Sent using the Window Cleaning Forums mobile app

 

[P4dstar]

That's very true as mine was 33 before the summer and went up to 70 buts it's come down this week too the low 50s.

Sent using the Window Cleaning Forums mobile app

Mine went from 175 to 210-350 so I just held out for the time of day where it went down to 210ish. In the last month it has been consistently 350-410 [emoji849]


Sent using the Window Cleaning Forums mobile app

 

[wee man]

Mine went from 175 to 210-350 so I just held out for the time of day where it went down to 210ish. In the last month it has been consistently 350-410 [emoji849]


Sent using the Window Cleaning Forums mobile app

Nightmare, I'm only double di so I was getting a bit worried lol

Sent using the Window Cleaning Forums mobile app

 

[P4dstar]

Nightmare, I'm only double di so I was getting a bit worried lol

Sent using the Window Cleaning Forums mobile app

I started double DI. Back then 175 meant my 11 litre canister lasted 2 full tanks. That was including having double DI set up. Essentially each 500L tank full was costing me a fiver so moving to RO made sense. Had I stuck with DI only I would have been in big trouble with my new TDS


Sent using the Window Cleaning Forums mobile app

 

[wee man]

I started double DI. Back then 175 meant my 11 litre canister lasted 2 full tanks. That was including having double DI set up. Essentially each 500L tank full was costing me a fiver so moving to RO made sense. Had I stuck with DI only I would have been in big trouble with my new TDS


Sent using the Window Cleaning Forums mobile app

I live in a upstairs flat so I'm trying not to go down the ro route but if the water had keep going up I would of had too. Hopefully that's it's settling down till next summer.

Sent using the Window Cleaning Forums mobile app

 

[P4dstar]

I live in a upstairs flat so I'm trying not to go down the ro route but if the water had keep going up I would of had too. Hopefully that's it's settling down till next summer.

Sent using the Window Cleaning Forums mobile app

I imagine we’ll not see that level again. It didn’t rain her for just under 3 months. Still waiting for mine to settle down.


Sent using the Window Cleaning Forums mobile app

 

[doug atkinson]

Hi i am using double di and theres something not right with it which i canny put my finger on it .

Going through two di,s it comes out at 2ppm ! 

Now if i test the first di by itself it reads 2 ppm so its pulling from 80ish to 2 ppm!

Then if i test the second one by itself it also reads 2 ppm 

Th back one used to get up to about 40ppm before i needed to change the front one . Im confused any help , ideas 

Have given them a good shake , only making about 1200 litres a month , Surley it should last longer than this ! Only about 2 months since i changed the back one .

If both are taking tap water to 002ppm then it sounds like your TDS meter may be faulty. Or the only time that happens if you have the vessel back to front