11 Heating installations and parts therefor, in particular apparatus for heating, refrigerating, drying, ventilating and water supply, boilers, hot water cylinders, indirectly heated service water heaters, instantaneous district heating apparatus for service water, pipes being parts of water heating systems, as well as district heating house substations and radiator accessories, assemblies for connecting radiators and panel heating systems to heating and district heating installations; sanitary installations in the nature of baths, washrooms, public shower installations, steam rooms, toilet installations and parts thereof, in particular water heaters, hot water cylinders for baths, washrooms and toilets and bath cubicles, shower cubicles and toilet bowls with accompanying parts for installation; pipes and pipelines being parts for heating and sanitary installations, namely, flexible pipes for drinking water and heating installations; fittings for water supply in buildings and real estate, namely, valves, taps, water draining fixtures and water supply fixtures; plumbing fittings, namely, quick-release couplings and screw fittings for water pipes and units, namely, boilers, air conditioners, heat pumps, solar heating collectors, water heaters; taps, valves and regulating accessories for water and gas apparatus and pipes, namely, mixing valves; fittings being parts for heating installations and for pressure regulation of heating installations; pressure regulators, in particular differential pressure regulators for heating installations; line regulating valves for heating and sanitary installations for hydraulic balancing. fittings for regulating radiators, namely, thermostat valves, fittings; distribution fittings for heating installations, namely, pump groups consisting of pumps, valves and shut-off valves; solar collectors and hot water cylinders being parts of solar installations; heat pumps for room heating and/or the heating of liquids; ironmongery and small items of metal hardware, namely, clamps, supports, brackets, screws, bolts, nuts being parts for heating or sanitary installations; Components being designed as quick assembly systems heating, sanitary, solar and air conditioning installations for distributing, collecting and conveying media, comprising vessels and tanks, manifolds, pumps, pump groups including pumps, valves and shut-off valves, branches and piping for heating, steam generating, cooking, refrigerating, drying, ventilating and water supply and sanitary installations