CSA/AM - ANSI Z21.22A-2000/CSA 4.4A-2000
Relief Valves for Hot Water Supply Systems
|Publication Date:||1 December 2000|
The standard set forth herein apply to the first edition of the Standard for Relief Valves for Hot Water Supply Systems, ANSI 221.22-1 999 . CSA 4.4-M99, 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.