The Pentair Whole House Carbon Filtration System reduces the unpleasant tastes and odors from chlorine and other organic substances, before it enters the home, without requiring messy cartridge change-outs. So you get the water you want, the way it's supposed to be, from every tap. Less chlorine means less wear and tear on your skin, your clothes and your water-using appliances and fixtures. And the simple, electronic system makes programming a breeze and even maintains its settings during power outages. A singular water control disc, versus multiple moving parts, extends life and reduces maintenance. The demand-initiated system regenerates based on water usage, saving salt and water, while an automatic bypass keeps water flowing during regeneration.