Apparatus, instruments and installations, all for heating, cooling, ventilating, air-conditioning or for water supply and sanitary purposes; ducts, pipes, pipe vents and cover grilles, all being parts of any or all of the aforesaid goods; cisterns, cistern valves; inlet and discharge connections in plastic and/or rubber, all for sanitary apparatus, instruments and/or installations; flushing water distributors for water closets; parts and fittings for all the aforesaid goods; all included in Class 11.;