Apparatus, equipment and facilities for the treatment, purification, clarification, settling, flotation and physical or physical-chemical filtration of water and all types of aqueous solutions, namely water filtration units for commercial, domestic and industrial use and water purifiers; Apparatus and facilities, namely, physical, chemical and biological reactors for use in softening, deionization, desalting, cooling, heating, evaporation, crystallization, aeration, disinfection, sterilization and filtration of water and all types of aqueous solutions; apparatus and facilities for supply and distribution of water and aqueous solutions, namely water purification tanks; permeable and semi-permeable membrane filter cartridges for use in the treatment and filtration of water and aqueous solutions; membrane treatment equipment, namely, ultrafiltration, nano-filtration, hyper filtration and biological membrane reactor filters all containing recirculated powdered activated carbon used for the filtration of water and other aqueous and hydro-organic solutions; metallic or textile cartridge water filters, sand activated carbon or other granular media water filters; equipment for iron and manganese removal from water, namely water filters; equipment for disinfection and sterilization of liquids and gases using UVs or other radiations, namely water treatment units; apparatus and facilities for dentrification, nitrification and removal of organic compounds in the field of drinking water, namely water purifiers