6
Water-pipe valves of metal; Metal valves for controlling the flow of fluids in pipelines; Manifolds of metal for pipelines; Screws of metal; Elbows of metal for pipes; Collars of metal for fastening pipes; Nuts of metal; Ducts of metal for ventilating and air-conditioning installations; Expansion joints of metal; Metal expansion joints for floors and walls; Tubes of metal; Tubes of metal; Junctions of metal for pipes including those from alloy steel and titanium; Metal hose fittings; Valves of metal other than parts of machines including those from alloy steel and titanium; Metal hoses for plumbing use; Storage and inspection boxes of metal; Seals of metal for the reduction of friction in metals
7
Pressure valves [parts of machines]; Pressure reducers [parts of machines]; Clack valves [parts of machines]; Pump control valves; Valves (parts of pumps); Dispensing valves being machine parts
11
Air-conditioning installations; Boiler pipes [tubes] for heating installations; Heating installations; Dampers [heating]; Safety accessories for water or gas apparatus and pipes; Water distribution installations; Fans [air-conditioning]; Taps for pipes and pipelines; Thermostatic valves [parts of heating installations]; Heat pumps; Regulating accessories for water or gas apparatus and pipes; Air purifying apparatus; Filters for air conditioning; Radiator valves [thermostatic]; waste pipes for sanitary installations; Dehumidifiers; Air conditioning units; Water filters; Flexible strip wound pipes of metal [parts of sanitary installations]; Air-conditioning installations; Fans [air-conditioning]; Air filters for industrial use; Valves for hot water and heating plumbing installations; Pressure relief apparatus forming part of water supply systems; Heating armatures; Radiant linear heating systems; Cooling systems with radiant linear panels; Heat exchangers, other than parts of machines
40
Treatment of metal parts to prevent corrosion; Galvanization