Camco 40655 Tastepure™ Portable Water SoftenerHelps reduce the hardness of your RV or boat's water. Premium ion exchange resin replaces minerals, such as magnesium and calcium that harden your water. A compact, space saving design allows the it to be stored in tight places. It features a convenient carry handle for easy transportation, a large mouth opening for effortlessly adding salt for regeneration, and a garden hose plug and cap to keep contents secure during transportation and storage.