replacement filter ste for Calcite (raise water pH to 9) 5-stage Portable Reverse Osmosis Revolution RO Purification System, 75 GPD. Made in USA. Total filters: 4
1st stage: Inline Sediment Filter 2"x10" 5 Micron, Made in Taiwan.
2nd stage: Inline Granular Activated Carbon T28 Carbon Pre-Filter 2"x10", NSF Certified, made in USA. Membrane (not include in package - change every 2-3 years).
4th stage: Inline K2548BB Omnipure Calcite (Acid Neutralization - pH raise) filter, 2"x10", NSF Certified. Increases pH level from 6-7 pH to 8-9.5 pH.
5th stage: Inline Granular Activated Carbon T33 Carbon Filter 2"x10", NSF Certified, made in USA. This is the best filter if your water has a pH level of 6.8 or lower. Physiological disease is almost always the result of too much acid stressing the body's pH balance.