Water conditioning equipment inside buildings - Mechanical filters - Part 1: Particle rating 80 µm to 150 µm - Requirements for performances, safety and testing
Plastics piping systems for hot and cold water installations - Crosslinked polyethylene (PE-X) - Part 3: Fittings (ISO 15875-3:2003 + Amd.1:2020) (consolidated version)
Specifications for installations inside buildings conveying water for human consumption - Part 5: Operation and maintenance; German version EN 806-5:2012— 32 стр.
Protection against pollution of potable water installations and general requirements of devices to prevent pollution by backflow; German version EN 1717:2000; Technical rule of the DVGW— 53 стр.