Quote Originally Posted by alton View Post
My experience with DI, when I used a Kent R/O/DI I got an average of 100 gallons before my DI cartridge was spent. I then switched to another company with chloramines blasters and my DI lasted me for a grand total of 200 gallons. I had spoke with others using the same RO/DI filters and theres where lasting 750 to 1000 gallons between changing. So what is in my water because my TDS runs around 200? Because of the expense I quit using DI years ago and have changed to where I use a 1 micron, then 2 chloramine filters, and then another 1 micron filter before it goes into the membrane and the TDS comes out at 2 with my 100 gpd system.
Could be a number of things we can check for pretty easily if you'd like (e.g., bad membrane, bad membrane housing, high CO2, chloramines). So we don't hijack Rob's thread, do you want to email us?

Russ