How many Stage RODI do I really need?

[dirtyd61]

Tired of going to the LFS for water. Pretty sure a RODI would have paid off already by now. Im running two 10g QT tanks and a 32g cube so I dont need high GPD production. My cities tap water has an average TDS rating of 28ppm for reference. Assume I can trend toward fewer stages?

 

[BuffaloLake]

Less stages=higher operating cost
More stages=lower operating cost

 

[Marco_99]

Buy once,cry once. A 5 or 7 stage with booster pump. BRS has these on sale all the time. Wait until there’s a sale

 

[TylerHaworth]

A 5 stage 75GPD is the minimum I would do.

Sediment
Carbon Block
Carbon Block
RO
DI

 

[BryanM]

FWIW, most RODI systems use far more ANION resin, so I found that I was wasting a lot of the mixed resin. I added a canister to my rodi system and now run seperate cation and anion canisters.

I have replaced the anion at least 6 times in the last two years, and still have not touched the cation.

 

[Anonymous'Reefer90]

Por si sirve de algo, la mayoría de los sistemas RODI utilizan mucha más resina aniónica, así que me di cuenta de que estaba desperdiciando mucha resina mixta. Añadí un cartucho a mi sistema RODI y ahora uso cartuchos separados para cationes y aniones.

He reemplazado el anión al menos 6 veces en los últimos dos años, y todavía no he tocado el catión.

De acuerdo a As I read, CO2 is the main enemy of anionic resin

 

[LeftyReefer]

A 5 stage 75GPD is the minimum I would do.

Sediment
Carbon Block
Carbon Block
RO
DI

That's the same setup/config that I run, except mine has a 100GPD membrane.

I ran this system for 5 years like that and just recently decided to add a booster pump to the system. Holy cow did that make a big difference! Now I wish I had done it from the start. Makes water so much faster now.

I'd definitely recommend a booster pump if your pressure is on the lower side. My pressure was around 60psi, which I didn't think was all that terrible, but I was surprised how big of a difference adding the booster pump made.

 

[dirtyd61]

That's the same setup/config that I run, except mine has a 100GPD membrane.

I ran this system for 5 years like that and just recently decided to add a booster pump to the system. Holy cow did that make a big difference! Now I wish I had done it from the start. Makes water so much faster now.

I'd definitely recommend a booster pump if your pressure is on the lower side. My pressure was around 60psi, which I didn't think was all that terrible, but I was surprised how big of a difference adding the booster pump made.

Yea, I would probably run a pump. Most homes are regulated pressure because higher PSI decreases the life span of fridge/dishwashers/etc. If you can pull from before the regulator you might see higher numbers.

 

[JumboShrimp]

I love my system-- and I agree a booster pump will no doubt be worth while.

 

[exnisstech]

I run a 4 stage and have 4 tanks including a 330g . Been doing it for 10 years or so. Nothing wrong with running more i suppose. For a brief period I ran two di stages so if the first stage was depleted I still got 0 TDS. I would swap the second stage to the first stage then add the fresh cartridge as the last stage. I ended up going back to a single di and just change it when needed. I have about 180 TDS in and get zero out so I can't think of a reason I need more stages. No chloramine so no extra stage needed for that. I do run a booster pump because with my regulator maxed I only get 40 psi.