4th stage Optional Refill bag #818 DI Resin Refill Bag

* DI (de-mineralize) resin refills, part no. 818, $18

* The bag contains DI resin refills for just enough one DI cartridge for the AR-104H DI filter.

* Nuclear grade with color indicator: for production of demineralized water of high purity, silica free.

* When the resin is used up, the green color resin will change to brown color. It will give you 0 ppm TDS, Conductivity attainable less than 0.1uS/cm or resistivity of close to 18 meg.ohm