Neo-Pure Radial Flow Filter Cartridge Coconut Shell GAC 25 Micron NP-RFG10BB Compatible Systems The NP-RFG10BB is used by the following water filtration systems. Aqua-Pure™ AP801B Large Diameter Water Filtration System Aqua-Pure™ AP801T Large Diameter Water Filtration System APWC801 Whole House System (AP801/AP801B Alternative) Ready to ship for immediate use.