DIN EN 12050-4 E:2012-10 Wastewater lifting plants for buildings and sites - Part 4: Non-return valves for faecal-free wastewater and wastewater containing faecal matter
2015DIN EN 12050-4:2015-05 Wastewater lifting plants for buildings and sites - Part 4: Non-return valves for faecal-free wastewater and wastewater containing faecal matter; German version EN 12050-4:2015
2015DIN EN 12050-4:2015 Wastewater lifting plants for buildings and sites - Part 4: Non-return valves for faecal-free wastewater and wastewater containing faecal matter; German version EN 12050-4:2015
2001DIN EN 12050-4:2001 Wastewater lifting plants for buildings and sites - Principles of construction and testing - Part 4: Non-return valves for faecal-free wastewater and wastewater containing faecal matter; German version EN 12050-4:2000
1970DIN EN 12050-4 E:1995-10 Wastewater lifting plants for buildings and sites - Part 4: Non-return valves for faecal-free wastewater and wastewater containing faecal matter