The Aqua Flo 41407002 Carbon Block RO Filter is a key component in maintaining clean, great-tasting water from your Aqua Flo Platinum QCRO 4-Stage Reverse Osmosis System. Designed for use in the 2nd and 4th stages, this 5-micron carbon block filter targets chlorine, taste, odor, and sediment—helping to protect the RO membrane and enhance overall system performance. Built for convenience, the Quick-Change cartridge allows for fast, tool-free replacement, making routine filter swaps simple and stress-free. The high-performance carbon block construction ensures consistent filtration and long-lasting durability. Compatible exclusively with Platinum QCRO systems, this replacement filter delivers reliable, everyday water purification for your home or office. This carbon filter is not designed to remove heavy metals like lead, mercury, arsenic, and cadmium. Heavy metal removal is usually filtered by a reverse osmosis membrane. This carbon block filter excells at reducing chlorine, organic compounds, taste, and odor, filtering sediment and particulates down to 5 microns.