Articles of metal for use in the water treatment industry; ducts of metal for concealing water pipes; fittings of metal for water conduits; metal drainage apparatus for use in the channelling of flood water; metal drainage apparatus for use in the collection of flood water; metal frames for water pipes; metal valves for water pipes; metal water conduits; metal water fittings incorporating flow control (parts for water pipes); metallic water pipes; water control valves of metal; water inlets (...