RO/DI filter....really????

[Zoaelite]

Originally Posted by frd72

I think i will agree with this. I have a 4 stage RO/DI and the waste water is just crazy not environment friendly. I read couple of articles too that RO and DI does same thing. So on the weekend i tried disconnecting the RO, then install the TDS meter after DI and this was the result:
Before: IN- 13 OUT- 0
After: IN- 12 or 13 OUT - 0 or 1
less waste and good for the environment. hopefully it will work out..
Just my reaction...\\

Must be nice to have water going in that isn't at almost 200 TDS to start .

Same sort of result but not the same thing, and there is a lot of stuff the ro strips out that a DI won't touch.

RO strips all the minerals/chemicals out of the water and leaves you with nothing but pure water. DI is a Ion exchange process where salts are replaced with Hydrogen making your water acidic and then the next resin makes it normal.

in industry where DI is called for is polishing ro water as a DI doesent remove a lot of the contamanants so you use the RO to remove the bulk and then a DI to remove anything else. on its own a DI will not last very log at all.

We used DI water for out boilers as it has to be absolutly cleen water, but the water went through a RO first down to about 5ppm then went through a two stage DI, mixed bed resins are very inefficient, the best way to do it would be to have one resin then the next resin in a different cartrage.

Steve

+1, perfect info in there.

[Ron99]

Originally Posted by StirCrazy

thats actualy an old wife's tale started by mineral water companies. if you eat you get more than enough minerals from your food.

Steve

+1000 The amount of dissolved minerals in our water is so far below our dietary requirements it makes no difference. We get all of our minerals; calcium, magnesium, etc. from our food, not water.