Burning through DI

[Kammetal]

I recently moved and set up a new brs 150 gpd dual ro system lest then a month ago. I noticed my color changing DI is depleted already! The tds after the membranes read 5 and after di 1 tds. i found the cities water report and this is what it states what can i do to slow the di from burning so quick?

 

[shwareefer]

Do you run the RO until it's low TDS, say 3ppm, before sending it through the DI? If you just turn it on without pre-running the RO stage or even worse have the whole setup on a float valve, the TDS creep will kill the DI resin fast because the initial water from the RO will have high TDS.

 

[KStatefan]

I would test for CO2 in your water. That can burn thru resin quickly. I had to add a degassing chamber to my system to remove most of it.

 

[LeftyReefer]

I'm guessing its the 2 ppm chloramines in your water.
I would look at ways to reduce that.

 

[Kammetal]

Do you run the RO until it's low TDS, say 3ppm, before sending it through the DI? If you just turn it on without pre-running the RO stage or even worse have the whole setup on a float valve, the TDS creep will kill the DI resin fast because the initial water from the RO will have high TDS.

I usually flush the system prior and after to making water. i am able to get it down to 5 before going to the DI

 

[Kammetal]

I would test for CO2 in your water. That can burn thru resin quickly. I had to add a degassing chamber to my system to remove most of it.

How did you ho about doing this?

 

[shwareefer]

oops.

 

[Kammetal]

I'm guessing its the 2 ppm chloramines in your water.

I would look at ways to reduce that.

oops.

?

 

[shwareefer]

?

I thought you were addressing me with your question to Kstatefan and when I realized you weren't I changed my post but there is no way to fully delete it. so 'oops'.

 

[Kammetal]

I thought you were addressing me with your question to Kstatefan and when I realized you weren't I changed my post but there is no way to fully delete it. so 'oops'.

oh ok lol

 

[Kammetal]

Watching BRS videos seems like adding a chloromine carbon block may help? or wonder if i can just replace the existing carbon block with the chloromine carbon block

 

[Midrats]

Put some source water into a container and check the pH. Vigorously aerate it for a while and check the pH again. If it's higher CO2 is your problem.

 

[KStatefan]

How did you ho about doing this?

You can do a PH test or there are test kits available.

What it the TDS of your source water and your water coming out of the membrane?