DIN 1988-6 E:2000-11 Codes of practice for drinking water installations (TRWI) - Part 6: Fire fighting and fire protection installations; DVGW code of practice
2010DIN 1988-600:2010 Codes of practice for drinking water installations - Part 600: Drinking water installations in connection with fire fighting and fire protection installations; DVGW code of practice
2002DIN 1988-6:2002 Codes of practice for drinking water installations (TRWI) - Part 6: Fire fighting and fire protection installations; DVGW code of practice
1970DIN 1988-6 E:2000-11 Codes of practice for drinking water installations (TRWI) - Part 6: Fire fighting and fire protection installations; DVGW code of practice