Thank you for explaining.
There are so many different ones out there and I want to get it right the first time. Can someone tell me what is the most important thing to have in a RO/DI?
These are some of the features (so to speak) of the one I am looking at.
Ultra RO / DI Unit RO75DI
Complete system to make ultra pure RO/DI water. Features:
Clear high pressure filter housings
Quick connect high pressure fittings
Mounting bracket
1 micron sediment filter
1 micron carbon block filter
Filmtec high rejection 75 gallon per day TFC membrane
100% mixed bed DI resin filter with color change indicator so you know when it is working
Color coded tubing
Check valve and capillary flow restrictor
Filter housing wrench, and instructions
Comes standard with a garden hose adapter to fit a regular water spigot or you can get the under sink connection kit for a more permanent connection
All gibberish to me!