Historical
ANSI Z21.87b-2005/CSA 4.6b-2005
Addenda 2 to ANSI Z21.87-1999/CSA 4.6-M99, Automatic Gas Shutoff Devices for Hot Water Supply Systems
Details test and examination criteria for automatic gas shutoff valves and devices which operate when the temperature sensing element is at 210ºF (99ºC) or less.
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