CSA/AM - ANSI Z21.22B-2001/CSA 4.4B-2001
Relief Valves for Hot Water Supply Systems
|Publication Date:||1 September 2001|
The standards set forth herein apply to the first edition of the Standard for Relief Valves for Hot Water Supply Systems, ANSI Z21.22-1999 · CSA 4.4-M99, and Addenda ANSI Z21.22a-2000 · CSA 4.4a-2000, and supersede corresponding standards therein. Following their preparation by the supervising subcommittee, they were accepted by ANSI and the Interprovincial Gas Advisory Council, and subsequently approved.
NOTE: Changes, other than editorial, are denoted by a vertical line in the margin.