The AQFS234 is designed for larger homes or in situations requiring higher flow rates. As a combined filtration and scale prevention solution, there's no need to worry about multiple systems to provide clean, soft water. The AQFS234 will prevent harmful hard water scale from forming on your pipes and other plumbing fixtures while eliminating chlorine odor and taste. In addition, the system will prevent corrosion from chlorides, silica and iron. The larger diameter housing is equipped with 1" NPT ports. It supports our 4.5" cartridges which utilizes a solid carbon block with a salt-free, scale reduction media that conditions and filters your water at the point of entry. Our cartridge is rated for up to 6 months and filters your water to a 5 micron level. The system housing is constructed of a durable, heavy-wall, high-pressure (125 PSI) UV resistant plastic and is a complete system. The AQFS234 comes with the system, a cartridge, mounting bracket, mounting hardware, wrench and installation instructions.