An anti-scale water filter system that protects your pipes and household appliance from scale, corrosion, and more. The patented scale Inhibitor effectively sequesters calcium and magnesium. It also inhibits corrosion, particularly iron, steel, galvanized, copper, and lead, by coating the surface of your pipes. The coating serves as a protective layer that makes it harder for bio-film to form. It also helps to stabilize chlorine as the chlorine will not react with the metal pipe if the coating exists. This water filter has a capacity of 250,000 gallons of water filtration. A whole house water filter with DIY installation and maintenance – refer to the manual and our helpful YouTube videos for easy DIY installation. NPT inlet/outlet and 20 in. X 4.5 in. Whole home water filter system has minimum impact on water flow (up to 15 GPM) and requires minimum maintenance. A water filtration system with top-notch quality – This whole house water filtration system also removes sediment, chlorine, rust, herbicides, industrial solvents, and more. The first stage high capacity polypropylene sediment filter achieves filtration down to 5 microns. The third stage carbon block filter is made of high-quality coconut shell carbon for maximum filtration efficiency and filter life. Both water filters are tested by an independent third party to meet NSF/ANSI standards. Both water filters have a capacity of 100,000 gallons of water, enough to supply a family of four with clean water for a full year. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help! Please note – This whole house water filter is installed at the main water supply line in order to treat all the water in your home. Unlike an RO system, this whole house water filtration system will NOT reduce Total Dissolved Solids (TDS) and instead keeps healthy minerals in your water; if you are interested in a filter that removes TDS, please consider our iSpring Reverse Osmosis (RO) systems. The polyphosphate filter does not remove calcium and magnesium from water – it only prevents those molecules from forming scale.