Conventional softeners have a very large surface that is in constant contact with water. Large amounts of bacteria and microorganisms grow on this large surface, which are released into the house's pipe network when there is a surge of water - for example, when there is increased water withdrawal. Even the supposed "automatic disinfection" of conventional softeners hardly shows any effect. That is why the installation of a Urspring behind a softener is a necessary measure to remove all bacteria, parasites, all other microorganisms and more than 99.99% of all viruses from the water.