WATER DISTILLATION UNITS; DRINKING FOUNTAINS; WATER FILTERS; WATER FILTERING APPARATUS; APPARATUS FOR PURIFYING WATER; REVERSE OSMOSIS WATER PURIFICATION UNITS; ULTRAVIOLET STERILIZERS FOR WATER TREATMENT; WATER IONIZERS; WATER FILTERS; WATER FOUNTAINS; WATER PURIFYING INSTALLATIONS; WATER PURIFYING APPARATUS AND MACHINES; WATER SOFTENING APPARATUS