4? 5? 6? 7!!??

[MnFish1]

Curious as to how many stages everyone is running on their RO/DI unit.
After my little fiasco I'm running the best of the best with 7 stages.
Sediment
5 Micron Carbon Block
1 Micron Carbon Block
(2) 75GPD RO Membranes
Cation DI Resin
Anion DI Resin
Mixed Bed DI Resin

I'll edit in a pic later, thought I had one on my phone but I don't.
But please share yours!

Me - a pre-filter, a carbon block from BRS (no clue as to the micron), Mixed Resin x1 and a 75 gpd - my tds is zero - beyond that - I dont care. Sometimes I think we overanalyze. This is not meant to criticize your system - only to say = I could add 2 more RO units - and 3 more filters - but I"m not sure what I (with my water) would gain.

 

[TheOne]

Aquafx 100gpd. I was burning thru DI resin so I added another carbon block and now my DI resin seems to last 3-4x as long.

My water is 150 tds going in and anytime I get anything other than zero coming out I change my DI resin. The other filters I change about every 4-6 months. I make around 75 gallons of water a month.

 

[Phyber]

7 stage. Was running 5 stage, but was burning through DI resin like it was salt on my dad's potatoes. I still burn through Anion pretty quick (not as quick as mixed resin) but much cheaper than before. The upgrade will pay for itself in a year I calculated. I have not replaced the cation or the mixed since upgrade - approx 400 gallons worth. I've replaced the anion 2x. Before I had to replaced mixed resin alone every 100 gallons.

Both 5 and 7 gave me 0 TDS output by the way.

Why were you burning thru resin? Well water/co2? I'm on well water and gave up trying to keep di resin fresh. I'd get maybe 20g of 0tds water before it turned brown.

Now I just deal with 2-3tds water. But if separating out the resin, or only using one half of the resin, could assist me I'm interested...

 

[MTBake]

7 stages. Pretty much the same as crabs, except the dual membranes. I use one membrane as I've heard and read conflicting information about the use of 2 memebranes from a couple people in the hobby I trust.

The ro line feeds my refrigerator icemaker and faucet. It also feeds faucets at 2 sinks. The di is manually activated via ball valves to fill ato and mixing containers as needed.

 

[ingchr1]

6 - I just added the cation and anion cartridges to see if the resins last longer. I'm on well water and suspect CO2 is using up the anion in the mixed bed.

 

[Tamberav]

Spectrapure MaxCap 90 - 5 stages - seems to get the job done!

 

[User]

I thought the question was going to be ‘how many times has your APEX randomly shut off your return pump today?’

I have a spectrapure 180gpd unit. 5 stage. Triple inline tds meter. Double RO, sediment, carbon, DI.

I run it at 70psi abd get 34 tds at the tap, 0 after the RO membranes, but run DI to get rid of non- tds contaminants. I haven’t changed any filters running it maybe 200gpmonth for 14 months, but my preDI tds wavers at 1 for a few minutes after I flush the system before a refill. Suspect I’ll need to change RO membranes fairly soon.

 

[Quietman]

Why were you burning thru resin? Well water/co2? I'm on well water and gave up trying to keep di resin fresh. I'd get maybe 20g of 0tds water before it turned brown.

Now I just deal with 2-3tds water. But if separating out the resin, or only using one half of the resin, could assist me I'm interested...

Not sure...i think anion removes things like nitrate, alk and aresenic ( online search). My city water is very hard so likely it's the alkinity components. Incoming TDS is 350 to 425... output from RO is <15 usually. I'm sure it's just that the mixed bed contains less anion resin than a dedicated anion bed.

If you're on well and burning through resin, it's likely CO2.

 

[Retro Reefer]

I’m running a 6 stage with 2 carbon blocks and 2 compact mixed resin DI stages all attached to a dolly which allows me to wheel it outside weather permitting or into kitchen when I need to make water also makes it super easy to store Out of the way.. I even took it to a friends house to help speed up the process making water for his new tank

 

[Doctorgori]

my 600 TDS water demands a 7 stage "resin burner" .....

 

[X-37B]

BRS 4 stage.
75 gpd.
40 tds city.
0-1ppm in di 0 out.
I make 100 gallons 2 drums every 2 months or so.

 

[Flippers4pups]

Curious as to how many stages everyone is running on their RO/DI unit.
After my little fiasco I'm running the best of the best with 7 stages.
Sediment
5 Micron Carbon Block
1 Micron Carbon Block
(2) 75GPD RO Membranes
Cation DI Resin
Anion DI Resin
Mixed Bed DI Resin

But please share yours!

Been thinking of adding to mine for sometime.

 

[DesertReefT4r]

I have a 6 stage system that started as a 3 stage 90 gpd Spectrapure. I have added over the years a 2nd carbon stage and 2 di stages. At a min you need a 4 stage system with di. Having 2 carbon and 2 di stages is nice because if the first one inline get depleted you have another as a back up but is not needed.

 

[MnFish1]

Been thinking of adding to mine for sometime.

Why? - I thought about it - only for saving wastewater - but I dont make that much

 

[AZMSGT]

BRS 5 stage with 2 100GPD RO membranes

 

[Flippers4pups]

Why? - I thought about it - only for saving wastewater - but I dont make that much

Just adding resin cartridges.

 

[JoshH]

my 600 TDS water demands a 7 stage "resin burner" .....

What kind of membranes do you run on your system?

 

[Jamestown]

Curious as to how many stages everyone is running on their RO/DI unit.
After my little fiasco I'm running the best of the best with 7 stages.
Sediment
5 Micron Carbon Block
1 Micron Carbon Block
(2) 75GPD RO Membranes
Cation DI Resin
Anion DI Resin
Mixed Bed DI Resin

But please share yours!

4 stage BRS, 250TDS at the wall, 0 on output. Only make about 10 gals a week tho...

 

[BornHandy]

6 stage with a booster for me, but looking at expanding...

 

[ca1ore]

Sediment - carbon - booster - RO - pro cation - pro anion - pro mixed bed - mixed bed ..... so, 7! Cation appears that it will last forever, anion lasts for about 500 gallons, pro mixed bed for around 1,000 and the final mixed bed for many thousand gallons.