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An approved type check valve shall be installed on liquid heat transfer piping to control thermosiphoning of heated liquids.

Related Code Sections

1212.10 Hydronics, Thermosiphoning
An approved type check valve shall be installed on liquid heat transfer piping to control thermosiphoning of heated liquids ...
1212.0 Hydronics, Valves
An approved type check valve shall be installed on liquid heat transfer piping to control thermosiphoning of heated liquids ...