Cast iron pipes; iron pipes; pipes and tubes of metal; cast iron pipes for water supply and sewerage systems; water-pipes of metal; metal sewer pipes; elbows of metal for pipes; pipe muffs of metal; metal junctions for pipes; deformed pipes of metal; metal flanges; metal flanges for pipes; valves of metal, other than parts of machines; water-pipe valves of metal; steel pipes; drain pipes of metal; branching pipes of metal; cast steel pipes; cast iron pipes having expansion/contraction and def...