Daisy chain rodi filters

[Oiler3535]

I bought a new RO Buddie after thinking my old one had broken. Turns out i was just stupid (or my kid played with it) and the hoses were moved around. Works fine. Now i have 2. Not a big deal, but I'm curious:

Can I daisy chain the sediment, carbon, and DI cartridges? I realize the pressure requirements mean i cant do 2 RO cartridges, so i just have a backup of that now. But I'm thinking theres no reason I cant daisy chain the others. Curious though.

 

[Oiler3535]

You run the sed filters in parallel first. The rest in line and you can have 2 membranes. I added a BRS water saver upgrade to mine.

2 membranes do not work well if you have high incoming TDS or low line pressure.


can double the product water output of a standard 75 or 100 GPD membrane without increasing the wastewater output. Installing them is pretty simple but it can get confusing quickly if you are not familiar with typical RO/DI plumbing. Take a picture of your RO/DI system before installing your water saver kit for reference just in case.

The Water Saver essentially takes the wastewater from the first membrane and refines it through a second membrane, getting the maximum amount of product water out of every drop. Since the second membrane is fed from the first, there is a slight pressure drop which could cause a decrease in performance and rejection. To combat the decrease in pressure, a booster pump kit along with a pressure gauge is a good idea so you can keep your pressure around 65 PSI for optimal production.

Thanks. I have low pressure so the 2 membranes wont work. But my tap is already pretty low TDS so im not too concerned. Are you saying i should only do 2 sed filters or could i run 2 sed, 2 carbon, and 2 DI resin?

 

[griss]

Booster pump?

 

[Oiler3535]

Run daisy chain as you call it allows the first sed filter to plug while the second does nothing. If you plumb them in parallel, y the incoming water to both and the y them back together after you double the capacity.

I ran 2 membranes at 55 psi line pressure for a few years and it worked fine but I added a booster pump last year to increase the output and it did.

I totally missed the word parallel for the sed filters. Easy to do. But how about for carbon and DI? They fine in series?

 

[griss]

Here's how my RO is set up, (not running a dual) but to give you an idea.

1. sediment filter
2. 5 micron carbon
3. 1 micron ChloraGuard
4. Booster Pump
5. 75 gpd RO
6. Cation DI
7. Anion DI
8. Mixed Bed DI