How many stages for RODI

[Dcloser12]

Over filtering won't do anything negative other than lower your water pressure, which can always be corrected with a booster pump. Most installations should have one anyway for proper efficiency although you don't need one.

I thought with my 1 microns I was shooting low but .5? I'll be owning those directly!

 

[Woodyman]

I thought with my 1 microns I was shooting low but .5? I'll be owning those directly!

These are the ones I use.

SpectraPure® ZetaZorb 0.2 Micron (Absolute) Sediment Filter Cartridge

The unique technology employed in the construction of the SpectraPure‚ ZetaZorb‚ Sediment Pre-filter enables the filter to hold 5x the Sediment of ANY OTHER filter with minimal pressure drop! That's 5x fewer filter changes! See why SpectraPure‚ is know

spectrapure.com

1 Micron Carbon Block Filter 10" - CF-1-10

SpectraPure Carbon Block Filter Cartridge - 1 micron (nominal), 2.8 inch D x 10 inch L SpectraPure 1 Micron Carbon FIlters are manufactured with high purity carbon. Great performance in reducing sediments, Chlorine reduction, color, and pesticides. Decrease VOCs (volatile organic compounds) such...

spectrapure.com

0.5 Micron Carbon Block Filter 10" - CF-0.5-10

FEATURES:• Available in 10 inch and 20 inch sizes• Remove chlorine, organics, taste & odor• Excellent service life• No channeling or bypassing of fluids• Meet NSF Standards.• 0.5 μm carbon block filters remove trihalomethanes, low levels of chloramine,pesticides, volatile organic chemicals and...

spectrapure.com

SpectraPure® SpectraSelect Plus 99% Rejection RO Membrane 90GPD - MEM-

SpectraPure‚ SpectraSelect‚ Plus¢„¢ 99% Rejection Membranes set the industry standards for contaminate removal, high flow rate, and membrane longevity! Manufactured in the US, Hand Tested for Quality! Trust SpectraPure‚ for all of your RO & RO/DI needs

spectrapure.com

DI gets tricky. I have BRS and spectrapure. I've used both and have both on hand. Various types, but..

Currently I am running 3 mixed beds from spectrapure, but those beds aren't listed on the site.

 

[Woodyman]

I thought with my 1 microns I was shooting low but .5? I'll be owning those directly!

This is basically what going down to the 0.5 gets you. Strictly necessary? No. 98(?)% of people are probably fine without it, but if you want the extra polish why not.

Note: Only 0.5 micron carbon block filters remove trihalomethanes, low levels of chloramine, pesticides, volatile organic chemicals and 99.95% of giardia and cryptosporidium cysts.

 

[LeftyReefer]

I started with a 4 stage and then recently added a 5th stage, which was just adding a second carbon block. I barely need a DI stage with my water.

I'm running:
.5 micron sediment filter
5 micron carbon filter (will replace with another .5 or 1 micron in the future)
.5 micron carbon filter
RO
mixed bed DI

triple TDS meter
probe 1 = source water (city water 80 TDS during winter, 100 TDS during summer)
probe 2 between RO and DI
probe 3 product water, post DI.

I don't go through much DI. In fact, I've never had to change my DI yet.
I often get 0 TDS out of my RO membrane, so I'm not sure my DI is even doing anything much of the time. Truthfully, I could probably get by without a DI stage if I had too.

Your really won't know what you need until you get it hooked up and see what you have in your water. Everyone's water is different.