1
Carbon filters, Filtering materials (chemical preparations), Filtering materials [unprocessed plastics], Filtering materials [mineral substances], Filtering materials based on plants
6
Parts and components for the storage or infiltration of water and other liquids, namely shafts, shaft covers, grilles, containers, rigid pipes for building, valves, other than parts of machines, fittings for the aforesaid goods, included in class 6, all the goods being of metal
11
Purification installations for sewage; Installations for the treatment of waste water, rain water, storm water, including settling pipes, settling tanks, settling pits, separators and water-supplying fittings; Filters (parts of household or industrial installations); Water filters; Water-supplying fittings and water separators being parts for rain water storage installations; Water filters, Water-supplying fittings and water separators being parts for rain water storage installations
17
Pipe couplings and fittings, all not of metal; Rings of rubber; Seals, sealants; Caulking; Sealing rings and sealing strips; Sealing materials; Filtering materials (semi-processed materials or foams of plastic); Flexible pipes, not of metal; Filter bags of textile, filters and filtering materials of plastic, included in class 17
19
Building materials (non-metallic) and non-metallic rigid pipes, In particular drain pipes, Drainpipes, Water pipes, Branch pipes, Railings, Shafts, Manhole covers, Manhole covers, Railings, Tanks of masonry (included in class 19); Drain traps (valves), not of metal or plastic, for drainpipes or water conduits; Geotextiles; Accessories for the aforesaid goods, included in class 19
20
Water-pipe valves and drain traps (valves) of plastic; Valves, other than parts of machines, Not of metal; Parts and components, not of metal, namely shafts, shaft covers, grilles, tanks of plastic