2022DIN 35861:2022-06 Regulated circulation valves in the drinking water installation - Requirements and tests / Note: This standard is part of the DVGW body of rules.
2022DIN 35861:2022 Regulated circulation valves in the drinking water installation - Requirements and tests
1970DIN 35861 E:2021-08 Regulated circulation valves in the drinking water installation - Requirements and tests