CSA ANSI Z21.22-1999/4.4-M99
$71.00
Relief Valves for Hot Water Supply Systems
1.1 Scope 1.
1.1 This standard applies to the following types of relief valves constructed entirely of new, unused parts and materials: (a) Temperature relief valves and combination temperature and pressure relief valves for use
1.1 This standard applies to the following types of relief valves constructed entirely of new, unused parts and materials: (a) Temperature relief valves and combination temperature and pressure relief valves for use
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