Swimming pool and spa water disinfection and cleaning equipment; Swimming pool water cleaning and filtering units; Swimming pool and spa sanitization units consisting of pumps, control units, filters, ozonator, acid injector, and hydrogen peroxide injector for sanitization of water in swimming pools and spas; System, installations and apparatus for disinfecting water; Water filtration equipment, namely, fiberglass-wound filter vessels and fiberglass gel coated filter vessels; Water cleaning equipment, namely, water softening equipment; Water cleaning equipment, namely centrifugal filters; Water cleaning equipment, namely, replaceable filters and pumps and valves for water filtration equipment; Water filtration equipment, namely, water filtration equipment for use with cooling towers for air conditioning units, oil refineries, thermal power stations, and petrochemical plants; Drinking water disinfection, filtering and cleaning equipment; Fish pond water filtration equipment; Water filtration equipment, namely, equipment used for electronic coagulation of sludge and contaminates