CSA ANSI Z21.22b-2001/CSA 4.4b-2001 (R2014)
Addenda 2 to ANSI Z21.22-1999/CSA 4.4-M99, Relief Valves for Hot Water Supply Systems
Amendment by CSA Group, 01/09/2002
Full Description
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Scope
Details test and examination criteria for:
,,1.,,Combination temperature and pressure relief valves for use on storage tanks of hat water supply systems without heater input limitation;
,,2.,,Valves having only pressure relief features for use on storage tanks of hot water supply systems without heater input limitation; and
,,3.,,Vacuum relief valves.