The carbonate hardness contained in tap water calcifies on your household appliances and can affect their lifespan. A water filter can easily solve this problem, because it reduces the calcium contained in filtered water. The results are immediately apparent: Your household appliances will no longer be affected by limescale deposits.
If calcium is contained in the water, this is balanced with the carbonic acid contained in it. If the water is heated, the carbonic acid is released and suddenly the lime content in the water becomes too high. In order to restore this balance, it drops and deposits itself on the heating surfaces of the water heater.