Manually operated valves of metal not for use in machines; nozzles of metal for use with pipes and hoses; elbows of metal for pipes; junctions of metal for pipes; clips of metal for pipes; drain traps of metal; manually operated water-pipe valves of metal not for use as plumbing fittings; manifolds of metal for pipelines for use in making multiple connections with hoses and pipes transporting liquids; pipework of metal