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

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

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.