LTB 3 cartridge DI Unit

[buildinboats]

I saw reference to a 3 DI cartridge unit here a while ago but can't find the thread. I want to extend the time to depletion for the resin portion of my RO/DI system. Anyone know the brand or where to get one from?

[kysard1]

A 3 cartridge system in series really doesn't extend resin depletion time. It just makes purer water that you don't need. After the first cartidge is depleted the resin will expell a high amount of ions which quickly fouls the second then third cartridge.

If you want to extend time between changes buy three separate DI canisters and hook them up in parallel.