Apparatus and installations for decomposing toxic substances in water; Dryers used for the removal of solid, liquid and vapor contaminants from compressed air and gases; Electrolytic water generators for electrically decomposing tap water to generate electrolytic water and for removing chlorine odor from tap water; Flexible pipes being parts of basin plumbing installations; Flexible pipes being parts of bath plumbing installations; Lights for illuminating stairs, doors and other portions of buildings; Water filtration and purification units and replacement cartridges and filters therefor; Water softening units; Water treatment equipment, namely, chemical sterilization units; Water treatment equipment, namely, reverse osmosis filtration units; Water treatment unit for aerating and circulating water