Our 1" US Water twin-alternating light duty water softeners are designed for light duty water softening applications, such as coffee shops, small restaurants, pre-treatment for reverse osmosis systems and lab water systems, where 24/7/365 delivery of soft water is essential. The computerized meter control is easy to set, and once set, and the system automatically switches between tanks, so that you always have soft water, even when one is regenerating. Twin-alternating water softeners will perform efficiently for many years because they fill the brine tank with soft water and regenerate with soft water. They have a 10 year warranty on tanks and a 5 year warranty on the valve and electronics.