RO / RI Need help :(

[Reefer180]

Need your expertise.

Got an RO drinking system last year. I just changed out the sediment and two carbon filters. My TDS reading was at 7ppm (out). So I decided to buy the dual DI canister from BRS. I installed it and the reading went wack!! Now its at 26ppm. The picture below is where I put the Y fitting connection. Is this correct??
Am I suppose to install it after the membrane? Or by the reservoir??

Please help.

Thanks,
Mike

 

[sabazerehi]

how long has it been set up? cuz when i first set up my ro/di, i had to let it run for a couple hours before it would read 0ppm, and same with when i changed my filters for the first time.

 

[Reefer180]

I did not let it run for couple of hours. I'll try this tomorrow. I ran it to filled up about 15 gallons.
Is connection where its suppose to be?

 

[sabazerehi]

did you let it run for a couple hours straight to kind of let things flush out? i'm a little limited in my ro/di knowledge myself, so hopefully some other people will chime in too as well

 

[laverda]

What is your TDS from the tap? The DI should be after the membrane in the line to your RO resivour, assuming the RO resivour is how you feed your ATO. It should always be after the membrane. Drinking water is usually Ted off before the membrane as it does not need all the minerals removed from it. Some people say RO/DI water can be hard on your stomach as it is striped of everything. You should not need a carbon filter on the drinking water line as it has already gone through a carbon block.

 

[skinomi]

x2 on laverda. u should have the di after the membrane to get the tds down to 0.

 

[vdubfiend]

You should splice in your "drinking water" where you have your "DI" spliced in at(in your pic)...

And your DI should be run inline- where your "drinking water" currently is spliced in at.

Your drinking water doesnt need to go through the RO membrane-

 

[Reefer180]

On the norm, the DI water is generally running slow?? After the membrane, there two lines coming out, one to drain and the other go to reservoir.
If it's connect to the reservoir, would that cause the DI to use the reservoir water?

 

[vdubfiend]

depending on pressure or temperature yes...

u need to cut the line from your membrane to your reservoir and put the DI inline there.

Per your drawing, your "product RO" water line should run THROUGH the DI (stage 1 and 2) then go out to your storage tank

 

[vdubfiend]

here you go

 

[oscar.millan]

It is my understanding that a drinking water system should go through the membrane. I'm really surprised to see several posts that state otherwise. So either I'm wrong (which is possible) or we have a misunderstanding of how RO/DI systems and drinking water systems should be setup.

I'm looking for diagrams now to backup what I'm saying. My drinking water system is setup after the Membrane, but before my DI. I believe this to be correct from all the research I have done.

I'll be posting shortly with more information.

What is your TDS from the tap? The DI should be after the membrane in the line to your RO resivour, assuming the RO resivour is how you feed your ATO. It should always be after the membrane. Drinking water is usually Ted off before the membrane as it does not need all the minerals removed from it. Some people say RO/DI water can be hard on your stomach as it is striped of everything. You should not need a carbon filter on the drinking water line as it has already gone through a carbon block.

 

[oscar.millan]

Here are my corrections, and a few notes:

<a href="http://s236.photobucket.com/albums/ff11/oscarmillan/RC%20Posts/?action=view&current=RODIcorrections.jpg" target="_blank"><img src="http://i236.photobucket.com/albums/ff11/oscarmillan/RC%20Posts/RODIcorrections.jpg" border="0" alt="Photobucket"></a>

1. Again, it is my understanding that the drinking water should be collected after the membrane, but before the DI.

2. Here is where you would T-off to collect drinking water. Again after the membrane.

3. I'm assuming this is a pressurized drinking water container. If so, this is where it's connected to the drinking water faucet, which allows you to have 2 to 3 gallons of water readily available.

4. Based on the diagram, the water at this stage is not just RO, but RO/DI. Mostly for completeness.

Hopes this helps, continuing to do research.

 

[vdubfiend]

I was under the impression that the tank was storage but if its for drinking water then yours makes sense however the drinking water should t off BEFORE the membrane..

 

[vdubfiend]

You need to T off for drinking water AFTER carbon blocks but BEFORE membrane

You need to install DI filters AFTER membrane but before your fresh water storage... NOT DRINKING WATER..

DRINKING WATER goes through your sediment and carbon filters ONLY- it does not go through the RO membrane.

The sediment and carbon blocks protect the membrane

The membrane removes a majority of the TDS

The DI polishes the water (if you will )

My incoming water is 215 TDS
After it leaves the sediment and carbon is about 200 TDS (splits off for drinking water here)
After it leaves the membrane its about 10-15 TDS
After it leaves the DI it is 0 TDS

 

[oscar.millan]

I believe that what you are saying is incorrect, let me try to find something to backup what I'm saying. Can anybody else chime in?

It is my belief that you are recommending something that is wrong. Let's keep the discussion healthy, but I feel strongly about my statements.

Do you have anything to backup what you're saying?

I hold my stance that drinking water needs to be collected only after it has been through the RO membrane.

I was under the impression that the tank was storage but if its for drinking water then yours makes sense however the drinking water should t off BEFORE the membrane..

 

[vdubfiend]

 

[oscar.millan]

Here is a link as to what an RO membrane typical removes:

http://espwaterproducts.com/about-reverse-osmosis.htm#remove

Here's the list:

Sodium
Sulfate
Calcium
Potassium
Nitrate
Iron
Zinc
Mercury
Selenium
Phosphate
Lead
Arsenic
Magnesium
Nickel
Fluoride
Manganese
Cadmium
Barium
Cyanide
Chloride

There is also a diagram on that same page on how to setup the drinking water portion of it. Clearly indicates that it must be run after the RO membrane.

 

[vdubfiend]

..........

 

[oscar.millan]

Here's a better view of your diagram:

<a href="http://s236.photobucket.com/albums/ff11/oscarmillan/RC%20Posts/?action=view&current=Diagram2.jpg" target="_blank"><img src="http://i236.photobucket.com/albums/ff11/oscarmillan/RC%20Posts/Diagram2.jpg" border="0" alt="Photobucket"></a>

I think the ASO Valve might be where the confusion lies. This diagram supports what I'm saying, does it not?

 

[vdubfiend]

YES !#$^!#$^1346q!#%&^57 sorry im so out of it

DRINKING WATER Ts off BEFORE the DI but AFTER the MEMBRANE

SORRY Im trying to do too many things at once :O