11 Installations and equipment for water supply and sanitary systems in the nature of pressure regulators for water and sanitary installations; apparatus and installations for the treatment of water, namely, electrostatic water treatment apparatus and installations; apparatus, namely, metal cylindrical chamber and screen for use in filtering and the removal of suspended solids from a liquid; installations, namely separators for the separation, cleaning and purification of liquids; apparatus and installations, namely, thickening and dewatering machines for use in the treatment and management of water, sewage, waste water and effluents; apparatus and installations namely, drainage water treatment tanks, sewage treatment and purification installations and waste and waste water purification unites for the catchment, drainage, storage, reticulation, distribution and disposal of wastewater, effluent and waste; purification installations for water, effluent, sewage and wastewater; filtering installations in the nature of water purification installations and also consisting of their parts, namely, integrated risers, lids, basins, adapters, pumps and pump systems; treatment installations namely reverse osmosis filtration units to separate water from contaminants; contaminants replacement parts and accessories for the aforementioned goods related thereto