11 Apparatus and installations for heating, cooling, steam generating, cooking, drying, ventilating, water supply and sanitary purposes; plumbing supplies, namely, pipes and fittings, being parts of sanitary installations; accessories for pipes, namely, sockets, and couplings, being parts of sanitary installations; floor drains, being parts of sanitary installations; trench drains, being parts of sanitary installations; drain gutters and parts thereof, namely, grates, traps, outlets, sediment containers, gutter angle pieces, filter baskets, and parts thereof, all being parts of sanitary installations; drainage, wastewater and sewage installations in the nature of installations composed of metal pipes, bends, branches, being parts of sanitary installations; all the aforementioned goods in this class only for use in the area of drains, drainage channels and sewage pipes as well as connecting parts for these; floor drain accessories, namely, covers, filters, grates, traps, plugs, inserts, and baskets, adapted for floor drains; marine drains being floor drains and parts and fittings therefor