The In-Line Alka-Pi Refrigerator Unit, with replaceable cartridge, can help protect your water supply by both lowering pH levels and keeping smaller sediment from entering your water supply. This In-Line unit ensures that your water filtration system continues to ionize the smaller sediment with the built-in oxidation cartridge. The Alka-Pi unit ensures your filtration system is covering all aspects of the filtration process– leaving you with the purest alkaline water possible. For ideal performance, it is best to ensure that your filtration system is checked regularly for cartridges that may be blocked, deteriorated or not properly positioned which can lead to malfunction or decrease in pressure within the water filtration system. The In-Line Alka-Pi alkaline unit comes fully equipped with a mineralizer to assist in the breakdown process of excess sediment. Due to its fine nature, this sediment often slipsthrough the carbon cartridges of the water system, making the mineralizer and oxidation cartridge a vital step in the purifying process.