CSA ANSI Z21.22b-2001/CSA 4.4b-2001 (R2014)

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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.