Large Automatic Whole House Nitrate Water Filter is designed to remove Nitrates from water, as well as perform other water filtration in a Whole House or light commercial applications. Dual tank system for medium-to-large houses, with a sediment pre-filter and carbon block post-filter. Water travels through 6 stages of filtration: * First stage, water flows through a 20" sediment filter cartridge * Second, Third and Forth stages, water flows through a KDF-85, KDF-55 and GAC * Fifth stage, water flows through a nitrate reducing mineral tank. * Sixth stage, water flows through a 20" solid carbon cartridge Dual Tank Nitrate Removal and Whole House Water Filtration System features: * Poly Glass mineral tank filled with REDOX and GAC with a brine mineral water conditioner. * Poly Glass mineral tank : filled with a nitrate reducing media. * Riser style 1" internal flow distributor. * Solid state microprocessor with LED display Electronics control valve 11.0 gallon-per-minute flow rate 3/4" or 1" Stainless Steel Bypass Valve. Manufacturer's Warranties: 1 year on complete system, 5 years on the Controllers, 10 years on the Tanks.