Order 3 years of RO replacment filters and maintenance kit and enjoy big discount with this value pack. 

For Model:  AR122

Package includes: three sets of KPAK-3, two bags of DI resin refill, one M150 membrane, and one MK800 maintenance kit.  

1st stage:  high capacity, multi-layer 5 micron sediment filter, to remove sediment, rust, sand, (replace every 6-12 months)

2nd stage:  high capacity carbon filter, carbon block, coconut shell activated carbon removes chlorine, taste & odor (replace every 12 months)  * We have modified the filter from granular to carbon block for higher performance.

3rd stage:  high capacity carbon filter, carbon block, coconut shell activated carbon further removing chlorine to ensure 100% removal of chlorine (replace every 12 months) * We have modified the filter from granular to carbon block for higher performance.

4th stage:  high performance membrane filter. This is a TFC type membrane with capacity of producing 150 gallon per day. High rejection membrane made by US MEMBRANE it removes 95% to 98% of all chemical, dissolved solids in tap water. (replace every 2 to 3 years) MADE IN USA

5th & 6th stage: DI (de-mineralize) resin refills. Each bag contains up to 3 refills, or 16 ounce of resin. It is able to process on average about 1600 gallons of RO water. 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

Maintenance kit: The maintenance kit includes: automatic shut off valve, flow restrictor, and check valve. Maintenance kit should be replaced regularly to maintain optimal operating condition and to prolong the life of the membrane filter.