Codes of practice for drinking water installations (TRWI); survey of standards and other codes of practice about materials, components and apparatus; DVGW code of practice— 15 стр.
Central drinking water supply - Guide lines regarding requirements for drinking water, planning, construction, operation and maintenance of plants - Technical rule of the DVGW— 10 стр.
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.
Graphical symbols for diagrams - Part 2: Symbol elements, qualifying symbols and other symbols having general application (IEC 60617-2:1996); German version EN 60617-2:1996— 40 стр.
Specifications for installations inside buildings conveying water for human consumption - Part 1: General; German version EN 806-1:2001 + A1:2001— 32 стр.
