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 joint for water heating equipment; pipe joint for water heating equipment; pipes cross joints for heating installations.

Water-pipes for sanitary installations; cocks for pipes and pipelines; pipes [parts of sanitary installations]; pipe hoop for water heating equipment; faucets; pipe nozzles for water heating equipment.

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

Pipe line cocks [spigots]; water-pipes for sanitary installations; pipe mouth for water heating equipment; pipe supplement for water heating equipment; faucets for pipes; pipes [parts of sanitary installations]; cross pipes for heating installations; pipe hoop for water heating equipment; three direction pipe joint for water heating equipment; pipe joint for water heating equipment