11 Apparatus and instruments for use in the purification, separation and sterilization of liquids and gases used in the biotechnology, pharmaceutical, medical, biopharmaceutical and food and beverage industries; Apparatus for filtering drinking water; Electrolytic water generators for electrically decomposing tap water to generate electrolytic water and for removing chlorine odor from tap water; External filtering device for use in a local containment area for removing oil and other contaminants from storm drain effluent as it exits storm water systems; Filters and filtering devices for air and gas conditioning; Filters for fluids, namely, for water and area-water solutions; Waste water purification apparatus, installations and tanks; Water filters; Water filtration and purification units and replacement cartridges and filters therefor; Water purification units; Water purification, sedimentation and filtration apparatus for clarification, thickening and filtration of water, waste water and industrial water; Water treatment equipment, namely, water filtration units and reverse osmosis units