11 Heating, steam generating, cooking, refrigerating, drying, ventilating and water conduit apparatus and sanitary installations, namely, heating furnaces, steam generators, cooking ovens, refrigerators, clothes drying machines, ventilating exhaust fans, tap water faucets, urinals; water purifying installations; water conduit installations, namely, pipes being parts of sanitary facilities, flexible pipes being parts of bath plumbing installations; water supply installations, namely, faucets; sea water desalination plants; sewage purification installations; distillation apparatus and distillation installations composed thereof not for scientific purposes; cooking ovens; accumulators included in this class, namely, heat accumulators and steam accumulators; solar furnaces; solar heat accumulators; solar collectors and solar collectors made of tube registers for heating; heat pumps; heat accumulators; heat exchangers, not parts of machines; fittings included in this class, namely, plumbing valves, plumbing drains; flat-plate and tube collectors, namely, heat accumulators; discharge valves, namely, level controlling valves for tanks; boiler tubes and fittings for heating installations and under floor heating; floor heating installations; showers and shower stalls; bathtubs and shower pans made of plastic; ventilating exhaust fans; boiler pipes being tubes for heating installations; taps for pipes; coils as parts of distilling, heating and cooling installations; refrigerating shipping containers; tubes, profiles, solid rods, shaped parts and plates made of plastic being parts of sanitary installations