40,000 grain capacity. Ideal for households of 1 to 5 or more people. Demand initiated regeneration with salt saving technology. Up to 1-1/4" super high flow valve for maximum water flow rates. Space saving single tank design. Removes up to 9 ppm (parts per million) of iron. Includes full installation kit and bypass valve. ECOPURE water softeners are the most efficient water softeners on the market (as rated by the NSF, National Sanitation Foundation) and have less than a 1% product service incident rate (lowest in the industry). Warranty: 1 year in home parts and labor, 3 years on electronics, and 10 years on tanks.