Devices to prevent pollution by backflow of potable water - Air gap with injector - Family A; Type D; German version EN 13079:2003
Edition 2003-12

Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A - Type B; German version EN 13077:2023
Edition 2023-07

Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B - Type A; German version EN 12729:2023
Edition 2023-07

JACOB'S LADDER. TYPE A.
Edition 1954-07-15

Codes of practice for drinking water installations - Part 200: Installation Type A (closed system) - Planning, components, apparatus, materials; DVGW code of practice
Edition 2012-05

Rubber: Acrylonitrile-Butadiene (NBR) Fuel-Resistant 60 - 70 Type A Hardness
Edition 2022-08-05

Elastomer: Silicone Rubber (MQ/VMQ), General Purpose 45 - 55 Durometer Type "A" Hardness
Edition 2019-02-28

Elastomer: Silicone, Rubber (MQ/VMQ), General Purpose, 55 - 65 Durometer Type "A" Hardness
Edition 2019-02-27

Elastomer: Silicone, Rubber (MQ/VMQ) General Purpose 65 -75 Durometer Type A Hardness
Edition 2019-04-05

Elastomer: Silicone Rubber, (VMQ) General Purpose, 75 -85 Durometer Type A Hardness
Edition 2019-04-05