6
Pipes and tubes of metal; Pipes of metal for heating installations, district heating installations and solar installations; Screw fittings of metal; Corrugated pipes of stainless steel; Corrugated hoses of stainless steel; Corrugated pipes of stainless steel for heat exchangers; Stainless steel pipes; Pipes of aluminium; Tanks of metal; Tanks of metal
11
Heat exchangers, not parts of machines; Shell heat exchangers; Solar heat collectors, Vacuum solar heat collectors; Heat exchangers of stainless steel; Water-pipes for sanitary installations; Thermal storage instruments [solar energy] for heating
17
Pipe insulation; Flexible tubes, not of metal; Insulating materials for pipes, namely pipe shells; Insulation for pipes, namely of polyethylene (PE) or polyurethane (PUR); Insulation for pipes, namely pipe shells of steelwool; Insulation for pipes, namely segments of steelwool; Lamella mats of glass wool; Lamella mats of steelwool; Insulating materials (protective sleeves for pipes); Plastic pipes for installation work; Plastic pipes for heating installations, district heating installations and solar installations; Rock wool; Rock wool for insulation; Granules of steelwool; Adhesive tape of rubber; Flexible pipes, tubes, hoses, and fittings therefor, including valves; Rubber; Pipe insulation; Mineral wool (insulator); Mineral wool for use as a building insulator; Mineral wool for insulating purposes; Non-metallic flexible hoses made of synthetic rubber; Casings of synthetic rubber for tubes; District heating hoses of plastic
19
Plastic pipes for plumbing purposes
20
Plastic tanks