TDS not changing much after DI resin

[GSnake]

hi,

had a rodi buddie 50 gpd, worked well for 4 years. switched to 4 stage 100gpd aquatic life classic, installed it today.

getting 9 tds from 140 tap water out of RO membrane,
and 6 after DI.

ran the ro membrane for a few hours with prefilters (3hours?), and ran it with di for 1hr with the results above

Am i missing something in the Di installation? or does the di need a break in period too? its just the plastic housing with an oring for the canister. seems simple enough

 

[pdxmonkeyboy]

I would look into your membrane. You should be getting around 1 or 2 ppm after RO. I get 4 ppm and my well water is like 400ppm

 

[GSnake]

Does it just need a longer break in period? I did double check the fitting of it already. Double pushed past the two o rings.

I thought the di would be able to take it down from 9

Also using booster pump at 83 psi in membrane

 

[SegmentFault]

Does it just need a longer break in period? I did double check the fitting of it already. Double pushed past the two o rings.

I thought the di would be able to take it down from 9

Also using booster pump at 83 psi in membrane

Just a thought but, you should reduce your pressure to let more contact time go through the DI stage. I think you're at the higher end of the pressure requirements.

Just my 2 cents :)