Sanitary installations and facilities as well as water supply systems, in particular steam baths, saunas and bathing facilities in the nature of baths, bath tubs, and bath installations, bath tubs for ice baths and ice bath installations, bath tubs for cold baths and cold bath installations, bath tubs for sitz baths and sitz bath installations, hydrotherapy baths in the nature of bath tubs equipped with cooling systems consisting of compressors, valves, pipes, control devices and electrical cables, sold as a unit; water purification, desalination and treatment plants, in particular water filters, water filtering apparatus and units; sterilization, disinfection and decontamination equipment, namely, water sterilizers, water treatment equipment, namely, ultraviolet sterilization units and chemical sterilization units, water disinfection apparatus; replacement parts and accessories for all the aforesaid goods, namely, sauna heaters, infrared sauna heaters, sauna mobile back rests specially adapted for saunas, sauna interior lights, installations for cooling and heating of bath tubs, bath tub cooling units consisting of compressors, valves, pipes, control devices and electrical cables, bath tub seats in the nature of bath seats with an ergonomically shaped sitting surface, bath tub enclosures, fitted covers for bath tubs