CSA/AM - ANSI Z21.22B-1984
RELIEF VALVES AND AUTOMATIC GAS SHUTOFF DEVICES FOR HOT WATER SUPPLY SYSTEMS
|Publication Date:||1 January 1984|
The standards set forth herein apply to the fifth edition of the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22-1979, and Addenda, Z21.22a-1983, and supersede corresponding standards therein. Following their preparation by the supervising subcommittee, they were accepted by American National Standards Committee Z21 and subsequently approved as American National Standard by the American National Standards Institute, Inc.