Buying a RO/DI unit --- Which one?

[jdieck]

So it does have dual layered photon blasters!!!

BTW is it a two toast toaster or a four toast toaster? I would think you would have to go all out and go for the four right??

Seriously though, thanks for the information. Now I just gotta figure out what the hell I want to do.

Pastry included!
Enjoy!

 

[RandalB]

J,
You make some good points, but I beg to differ about more than one of them. Unfortunately I just woke up after a 12 Hour shift and have to get the kids off to school....

More later...

RandalB

 

[ostrow]

Jose's system as a whole is straight out of Star Trek.

 

[sterlruth]

Jdieck,

I found your post very informative. I had been thinking about

Captive Purity 75 GPD RO/DI Pro RO/DI Filter System - Clear Canisters ..... Marine Depot

Now I am going to purchase Spectra

I was looking at this

SpectraPlus 2000 5-Stage RO/DI - 90gpd

Wanted to know your thoughts... (my evaporation rate is low so I 75 or 90 gallons a day is fine)

Steve

 

[sterlruth]

Jdieck,

I guess this is my question:

Difference between:

SpectraPure CSP-DI 90 GPD RO/DI System

and

SpectraPure Spectraplus2000 90 GPD RO/DI

Thanks

Steve

 

[sterlruth]

Four stage: De-Ionization: If your tap water is not heavy with dissolved solids (Less than 200 ppm) or is not trated with chloramine you can get away with a single DI cartridge. If your water is chloramine treated or has heavy dissolved solids (More than 200 ppm) then you need two DI stages.


I treat my well water with Bleach and my TDS is around 200 after treatment so perhaps the dual stage (5 Stage SpectraPure)

Does that sound correct?

Steve

 

[jdieck]

J,
You make some good points, but I beg to differ about more than one of them. Unfortunately I just woke up after a 12 Hour shift and have to get the kids off to school....

More later...

RandalB

Looking forward for your comments, there is always more to learn.

 

[jdieck]

Jdieck,

I guess this is my question:

Difference between:

SpectraPure CSP-DI 90 GPD RO/DI System

and

SpectraPure Spectraplus2000 90 GPD RO/DI

Thanks

Steve

Both have same sediment and carbon filters and membranes but the CSP DI has a single beneric mixed bed resin DI cartridge.
The 2000 has two DI cartridges, on is a strong Anion Cartridge and as per Spectra it will remove more silica and phosphates and the second one is suposd to be indicated for Ammonia removal (will also remove the rest of impurities). So this combo of DI cartridges will be ideal if your water is treated with chloramines which will not be your case. This will be a good combo in case you have high CO2 content in your source water (some wells do) so the second cartridge will last longer.

You mentioned you treat your well water with bleach if you do not have a special activated carbon filter for your home to remove excess chlorine (from the bleach) then having two carbon filters before the membrane seem to be a safe way to go. Remember that Chlorine can easily damage the membrane.

 

[sterlruth]

Thanks...

As I mentioned, I enjoyed your comments and changed my decision based on some prior looking around and your Part I Part II information. (Nice picture. I tried to piece together what was what and looks like you have a lot invested in your system based off of the limited view of the picture)

I too look forward to Randal's remarks... I searched some of his postings but again nothing like yours so I would be interested in what points he brings to the table.

 

[jdieck]

Thanks...

As I mentioned, I enjoyed your comments and changed my decision based on some prior looking around and your Part I Part II information. (Nice picture. I tried to piece together what was what and looks like you have a lot invested in your system based off of the limited view of the picture)

I too look forward to Randal's remarks... I searched some of his postings but again nothing like yours so I would be interested in what points he brings to the table.

Note that you can always get a cheaper unit and upgrade the cartridges later.

 

[ziac]

well i got a typhoon III of ebay for 126.00 + 22.00 shipping great unit at a great price look there if you in a pinch he puts some up on no reserve auctions and you can get a deal

 

[BradL.]

So did you decide on a unit Sellout?I am looking for a good unit myself.I wonder if we bought several as in a group order we could get a better price.

 

[coraladdict]

jdieck,



If my understanding is right , with the Typhoon III, I should ask them to put a 1 micron sediment filter and two 1 micron block filters ?

I also intend to buy the add on storage tank, do you see any inconveniences with this setup?

Very informative BTW

 

[sterlruth]

SpectraPlus 2000 5-Stage RO/DI - 90gpd

SpectraPlus 2000 5-Stage RO/DI - 90gpd

jdieck,


I ordered the SpectraPlus 2000 5-Stage RO/DI - 90gpd Monday from Marine Depot and should get it some time next week.

I appreciate your help and think that for my needs the Spectra is a bit better than the Typhoon.

Thanks

Steve

 

[jdieck]

Re: SpectraPlus 2000 5-Stage RO/DI - 90gpd

Re: SpectraPlus 2000 5-Stage RO/DI - 90gpd

jdieck,


I ordered the SpectraPlus 2000 5-Stage RO/DI - 90gpd Monday from Marine Depot and should get it some time next week.

I appreciate your help and think that for my needs the Spectra is a bit better than the Typhoon.

Thanks

Steve

:thumbsup:

 

[jdieck]

jdieck,

If my understanding is right , with the Typhoon III, I should ask them to put a 1 micron sediment filter and two 1 micron block filters ?

I also intend to buy the add on storage tank, do you see any inconveniences with this setup?

Very informative BTW

You only need to ask for the replacment of the sediment filter to 1 micron.
The storage tank I understand is a bladder unit which stores water under pressure. It is most useful and wastes less water when you have a booster pump.

 

[RandalB]

Back in town finally...

Back in town finally...

First of all, Congrats to J on his TOTM good to see someone local get the honors!

Other than that,

The reason you haven't seen a post like J's from me is that I am a recent arrival here at RC. LOL.

Here's some links if you want to read stuff like this from me:

http://www.simplydiscus.com/library/water_chemistry/ro_di_filtration/ro_parts.shtml

http://www.simplydiscus.com/library/water_chemistry/ro_di_filtration/ro_unit_assembly.shtml

http://www.simplydiscus.com/library/water_chemistry/ro_di_filtration/ro_di_info.shtml

and a few more:
http://www.simplydiscus.com/forum/showthread.php?t=34884

Good choice on the Spectrapure, they are one of the better commercially available units. They still like to play the games though. After that first set of prefilters clogs up on you, replace them with a 10 Micron Sediment Filter and 5 Micron carbon(s).

There is no need for filtration less than 5 micron unless you have bacteriologically unsafe tap water. The 1 Micron, 0.5 Micron and 0.2 Micron filters do nothing for the membrane other than reduce pressure available to it and lower overall unit efficiency. They are also sold for more $$ even though the wholesale price is almost the same as the higher micron rated filters($0.15-$0.25 more for the smaller ratings!). Filmtec's warranty states that they require 5 Micron Filtration. Nothing Less.

In our area, anyone on Chicago or Municipal wells has an average particulate solid measurement of 7-10 Microns. If you are using 1 or 0.5, they clog up very quickly and need to replaced more frequently. Add in the fact that the company selling them is charging more because of the lower micron rating and you see why they are recommending the smaller micron rating. That's why I use a 10,5,5 Array on my RO units and I recommend the same to everyone who asks me. The 10's and 5's are cheaper to purchase at retail and will last longer. More bang for your buck!

Another thing to mention, all the prefiltration in the world will not lower the TDS of your output water. All that prefiltration does is remove particulate matter and chlorine. It's all about what's reaching the membrane. The things that make the difference are: Pressure (above 50 PSI for filmtecs, 64 for others), Temperature (up to 113-115F), pH (8.0 or lower) and TDS of feed (200PPM or lower). So if you have a system like J, with the booster, you will get the lower TDS output water and save on DI resin.

Good discussion all, Let's keep it going now that I can jump in here and there...

RandalB

 

[BreadmanMike]

Is there a way to make my old Hi-s 35gpd Kent better, or am I better off scrapping it and buy a typhoon 3? Also where can I get a pressure booster? Thanks in advance!

 

[jdieck]

Randal.. Great info.
Told you I like to learn new things. It is the first time I read about the filtration requirement on Filmtec warranty
Would not be better to use 5-5-5 if you are using long lasting carbon? Would it be better to clog and replace the sediment than the carbon filter?
By the way, is wholsale available just by the number of lot purchase to individuals or only for established businesses?

 

[jdieck]

Is there a way to make my old Hi-s 35gpd Kent better, or am I better off scrapping it and buy a typhoon 3? Also where can I get a pressure booster? Thanks in advance!

What is wrong with it? There are good supliers of pumps on line. May be Randal can get you one