Protection against pollution of potable water installations and general requirements of devices to prevent pollution by backflow - Technical rule of the DVGW; German version EN 1717:2000— 48 стр.
Water conduit for fire extinguishing - Planning, installation, operation and maintenance of fire hose systems and pillar fire hydrant and underground fire systems— 41 стр.
Specifications for installations inside buildings conveying water for human consumption - Part 5: Operation and maintenance; German version EN 806-5:2012— 32 стр.
