The Pure Hydration Refill Cartridges fit both Pure Hydration and pH UNDER water filter machines. The set of five includes cartridges #1-#4 and an extra #3 cartridge to be changed mid-way through the life of the cartridge set. The Cosan/USA proprietary water filtration systems are dependent on regular cartridge changes to maintain the integrity of the system.
The Pure Hydration and pH UNDER water ionizers provide the best, all-natural method of purification and transformation of the water to an ideal pH to enhance the performance of the body. Loaded with antioxidants, the molecular hydrogen gives the body an immune system assist. Be sure to change those cartridges regularly to keep the body in tip-top shape.