2016DIN EN 12566-1:2016 Small wastewater treatment systems for up to 50 PT - Part 1: Prefabricated septic tanks; German version EN 12566-1:2016
2004DIN EN 12566-1:2004 Small wastewater treatment systems for up to 50 PT - Part 1: Prefabricated septic tanks (includes amendment A1:2003); German version EN 12566-1:2000 + A1:2003