D/I resin help

[irocz2280]

Ok so i am having a problem with my DI resin and been reading on how long it lasts people in their systems. My issue is that i am changing it every 80 Gals. of water and its getting too damn expensive. anyone have any clue what is going on. and it has been this way since ive installed the r/o filter. i have a booster pump pushing it to about 80psi i flush the membrane every 2 weeks or so and the membrane is about 3 years old also tds coming out of r/o membrane is around 4 and out of DI its 0. this a 4 stage system and i change prefilters every 6-9months depending on output

 

[pecan2phat]

If your only getting 4ppm out of the RO membrane, then the DI lasting only 80g of makeup water doesn't make sense.
Somethings not right.

 

[johnny roastbeef]

How do you know the resin is used up? Color changing resin changes color twice in my experience. Within the first few hundred gallons the resin turns a little darker brown, and then as it is actually consumed, it turns a much darker color.
At first I was very disappointed at how quickly the color changed, but since TDS hadnt gone up, I continued to use the same resin. After a few months, I could see the color of the rein start much more significant color change.

 

[irocz2280]

the tds is going up it goes up as soon as the resin has changed color. its is 0 when it is blue then when it turns brown all the way through it jumps from 2 then 4 then 10 and so on the longer i go without changing it the higher the tds gets.

 

[mbg75]

Using Tds to know when Di is exhausted is good. It's expensive if u buy replacement cartridges.
I buy the Di resin and refill my own cartridges.

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[ZANYMASTER]

The membrane is pretty old and it might be by-passing it and exhausting the DI.

 

[irocz2280]

Using Tds to know when Di is exhausted is good. It's expensive if u buy replacement cartridges.
I buy the Di resin and refill my own cartridges.

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This is also what i do brs di resin is pretty well priced about $10 for a 1 pound bag vacuum sealed

 

[irocz2280]

The membrane is pretty old and it might be by-passing it and exhausting the DI.

The only problem with this theory is that it did the same thing when it was new ive been going through this the whole time i have had the filter.

 

[irocz2280]

If your only getting 4ppm out of the RO membrane, then the DI lasting only 80g of makeup water doesn't make sense.
Somethings not right.

Thats what i'm saying but i can't figure out what

 

[polywise]

Is your DI filter after the RO membrane ?
Mine is the last in line before going to the tank
Mine is set up supply----> sediment/carbon/ro/di -----> to tank

 

[irocz2280]

Is your DI filter after the RO membrane ?
Mine is the last in line before going to the tank
Mine is set up supply----> sediment/carbon/ro/di -----> to tank

Yes it is

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[irocz2280]

Someone said something to me about c02 being a big factor in a fast depleting di resin can anyone elaborate a little more on this

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[irocz2280]

So I moved from the old place and have been here for 3 months and have not changed my resin yet. I've gone through about 90 gallons of water and still have some resin that hadn't changed.lol I guess I solved my problem thanks guts for all the advice.

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[andylee]

Still makes no sense. All the major stuff should be out before the di in either setting, especially if tdi was only 4 at the old place before hitting the di.

 

[irocz2280]

Yeah I know so maybe it actually is co2 in the water I have heard a lot of people tell me that .I work for a plumbing supply company and ask one of our water treament specialists and he said it def could be over abundance of. CO2 that could be destroying the resins charge

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