Fisher and Paykel DD-603 Built-in Dishwasher

Dish Drawer models DD603H and DS603H are fitted with a water softener which is designed to remove the calcium and magnesium ions that cause water to be hard . The water softener will automatically remove the hardness from the water using a salt solution. The amount of salt required will depend on the local water hardness. Your local water company will be able to provide you with the information on the water hardness in your local area.