SpiroPure descaler water filter cartridges have a German-made, advanced descaler technology that offers a salt-free alternative to traditional water softeners. The descaler not only prevents hard water buildup on plumbing pipes, fixtures, and appliances, but also removes existing buildup from pipes. Salt-free water softening means less hassle, no maintenance, no mess. Just switch out the cartridge! Our cartridges are also better for the environment, won’t affect the taste or smell of your water, and preserve healthy minerals in drinking water unlike traditional water softeners.