11 Installations for water purification; water conditioning installations; filters for water filtering apparatus; installations for the treatment of water flows, waste water, drinking water, industrial water with filtering media of natural and synthetic cloth and fabric; systems for the treatment of water flows, waste water, drinking water, industrial water comprising basins, baffles, valves, pumps, mechanical filters, gravity filters, filters made of natural and synthetic cloth, membranes, mixers and regulating overflows for use in industrial and municipal installations for filtration and treatment of water flows, waste water, drinking water and industrial water