The A.O. Smith AO-WH-DSCLR Water Softener makes all your water needs salt-free. It includes the water you use in drinking, cooking, showering and bathing. It also reduces the sediment and turbidity in/of the water. It helps to reduce the scale building up in pipes and plumbing caused by either well or city water systems. This softener filter is perfect for households of 4 or more people.