Water-pipe valves of metal; ducts of metal, for central heating installations; valves of metal, other than parts of machines; elbows of metal for pipes; ducts of metal for ventilating and air conditioning installations; steel tubes; water-pipes of metal; tubes of metal; junctions of metal for pipes; pipework of metal; three direction pipe joints of metal for water heating equipment; pipe joints of metal for water heating equipment; pipe cross joints of metal for heating installations

Steel tubes; ducts of metal, for central heating installations; water-pipes of metal; elbows of metal for pipes; tubes of metal; junctions of metal for pipes; valves of metal, other than parts of machines; pipework of metal; water-pipe valves of metal; ducts of metal for ventilating and air conditioning installations