[justa-hairyape]

From what I understand it is very hard water around central Texas. Checked out the Zero Water web site. And it does look like a good filter. That is not sand though. Appears to be a comprehensive ion exchange array. Doubt you will be able to reproduce that stuff. Might be proprietary.

Ion Exchange Filter

By the looks of it, the filters will not last long in Texas. Up to 15 gallons per filter. My RODI unit just cranked out over 600 gallons the past 2-3 weeks. Use the water for my business.

[Terry Mross]

We get a little better than 15 gallons per filter. It comes down to about 75 cents a gallon and that’s cheaper than buying it.

I’m north of Houston in a Municipal Water District.

How much does this system you have costs?