17
Goods of rubber, gum, not included in other classes, plastics in extruded form for use in manufacture; packing, stopping and insulating materials; flexible pipes, not of metal; caulking material; stuffing rings; draught excluder strips, weather-stripping; synthetic resins (semi-finished products); semi-processed plastic substances; building materials, wholly or mainly of non-metallic materials, namely fittings and sections, in particular connectors, transistion pieces, reducing adapters and closures for pipes; pipes and mouldings for the transport of heat and/or for the recovery of heat, including heating pipes, heat conducting pipes, heat transfer pipes; in particular coolant pipes and coolant ducts of metal and/or plastic; pipe jackets; junctions for pipes; all goods included in class 17
19
Building materials (non-metallic), non-metallic rigid pipes for building; building materials (non-metallic) and/or non-metallic rigid pipes, namely blocks, boxes, containers, troughs, tanks, storage elements, shafts, drainage pipes, geotextiles for underground storage, stocking, cleaning and percolation of water; non-metallic rigid pipes, in particular for use as ground source heat pipes, ground source heat collectors or flat-plate heat collectors; non-metallic rigid pipes for storing and recovering heat deep underground; non-metallic rigid pipes for utilising ground heat with ground source heat collectors; flat-plate collectors, for the operation of heat pumps, for use in cooling buildings or temperature equalisation of concrete cores; containers, not of metal, for storing water, for storing heat, for the operation of heat pumps or for the use of latent heat; pipes and tubes, pipelines and mouldings for the transport of heat and/or for the recovery of heat, including heating pipes; heating conducting pipes, heat transfer pipes, pipelines and ducts of plastic for coolants; Water pipes not of metal; all goods included in class 19