Functional standards, standards for performance and installation in the field of waste water engineering for systems and components. Where there is no existing material related TC, product standards for all components of discharge pipes, drain and sewer pipes, pipelines, separators etc. according to the resolutions of BT (for the organization of word in the field of metallic tubes see resolution BT 160/1989). Standards for design, calculation, construction, commissioning, operation and maintenance in the field of waste water engineering from the point of view of origin (with the exception of the product standards for sanitary appliances*) up to the point of disposal, including treatment plants. *) Citerns, urinals, kitchen sinks, basins bidets, baths, (including whirlpool baths) and shower trays, see TC 163 Resolution 2 (London), WG 3 and 4.
