7
Pumps [machines]; Pumps (machines) for wastewater and rainwater septic systems; Pump installations; Lifting installations; Filtering machines used in sewage handling; Feeding pumps
11
Installations, purifying and stimulating of wastewater and rainwater and parts for the aforesaid installations, included in this class; Regulating and safety accessories for the aforesaid installations; Small clarifying installations; Water conduits installations; Water purifying installations; Water distribution installations; Rainwater utilising installations for the sanitary sector; Filters [parts of household or industrial installations]; Aerators; Carbonating inserts for water apparatus; Apparatus for distributing air in waste water and rain tanks; Rainwater seepage installations; Seepage systems; Devices for removing contaminants from water; Disinfecting installations of wastewater; Ultraviolet installations for water disinfection; UV lamps (not for medical purposes)
17
Containers of plastic for installations for clarifying, purifying and revitalising wastewater and rainwater; Safety blocks of plastics
19
Containers and basins of concrete and masonry for installations for clarifying, purifying and revitalising wastewater and rainwater; Prefabricated building components (non-metallic), in particular of concrete; Non-metallic transportable buildings