Convert your present cartridge system to a down tube system and increase your output of DI water production by 40%.
When you use a cartridge you run the chance of getting blow by when the seal at the top starts to leak internally, this gives you a false reading and causes you to change resin way too soon.
It is simple to do and requires no tools.

This conversion kit is designed to fit the CR Spotless DIC20 DIW20 only. It may fit other systems but if these are purchased for any non CR Spotless system they are sold without any warranty.