6
Branching pipes of metal; bindings of metal; clips (cable and pipe- ) of metal; clips (cable and pipe- ) of metal; fastenings of metal; High-pressure pipelines (of metal); flanges of metal (collars); copper rings; rings of metal; frames of metal for building; Metal tubing; elbows for pipes of metal; pipework of metal; valves of metal (other than parts of machines); sealing caps of metal; pipes for hot water heating apparatus and domestic district heating stations and radiator accessories
7
Fittings for engine boilers; motors and engines (except for land vehicles); couplings other than for land vehicles; taps (parts of machines, engines or motors); valves (parts of machines)
11
Heating installations and parts therefor, included in class 11, in particular apparatus for heating, refrigerating, drying, ventilating, water supply and sanitary purposes, boilers, hot water cylinders, indirectly heated service water heaters, instantaneous district heating apparatus for service water; coils (parts of heating and cooling installations); assemblies for connecting radiators and panel heating apparatus in heating and district heating installations; sanitary installations and parts therefor, included in class 11, in particular water heaters, hot water cylinders for baths, washrooms, toilets and prefabricated installations for sanitary cells, namely prefabricated installation frames, assemblies and blocks for sanitary installations, for pre-wall installations, included in class 11; pipes and pipelines being parts for heating and sanitary installations, namely flexible pipes for drinking water and heating apparatus, included in class 11; fittings for water supply in buildings and real estate, quick-release couplings and screw fittings for water pipes and units, included in class 11; taps, valves and regulating accessories for water or gas apparatus and pipes; fittings being parts for heating installations, for the pressure regulation of heating installations; pressure regulators, in particular differential pressure regulators, balancing valves; fittings for regulating radiators; distribution fittings for heating circuits; solar collectors (heating) and hot water tanks for solar installations; solar modules for heat generation; photovoltaic accumulators and heat pumps, for room heating and/or heating liquids, included in class 11; distribution installations being quick assembly systems for apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes