update:

missing or BQ or EN:

EN 1123-3:2004 Pipes and fittings of longitudinally welded hot-dip galvanized steel pipes with spigot and socket for waste water systems - Part 3: Dimensions and special requirements for vacuum drainage systems and for drainage systems in ship-building
EN 1124-3:2008 Pipes and fittings of longitudinally welded stainless steel pipes with spigot and socket for waste water systems - Part 3: System X - Dimensions
EN 1253-4:2016 Gullies for buildings - Part 4: Access covers
EN 1253-5:2017 Gullies for buildings - Part 5: Gullies with light liquids closure
EN 12566-1:2016 Small wastewater treatment systems for up to 50 PT - Part 1: Prefabricated septic tanks
EN 12566-3:2016 Small wastewater treatment systems for up to 50 PT - Part 3: Packaged and/or site assembled domestic wastewater treatment plants
EN 12566-4:2016 Small wastewater treatment systems for up to 50 PT - Part 4: Septic tanks assembled in situ from prefabricated kits
EN 12566-6:2016 Small wastewater treatment systems for up to 50 PT - Part 6: Prefabricated treatment units for septic tank effluent
EN 12566-7:2016 Small wastewater treatment systems for up to 50 PT - Part 7: Prefabricated tertiary treatment units


mssing are:

EN 752:2017 Drain and sewer systems outside buildings - Sewer system management
CEN/TR 1295-3:2007 Structural design of buried pipelines under various conditions of loading - Part 3: Common method

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