Historical
ANSI Z21.22a-2000/CSA 4.4a-2000 (R2008)
ANSI Z21.22a-00(R08)/CSA 4.4a-00(R08) - Addenda 1 to ANSI Z21.22-1999/CSA 4.4-M99, Relief Valves for Hot Water Supply Systems
Scope
Details test and examination criteria for:(1) Temperature relief valves and combination temperature and pressure relief valves for use on storage tanks of hot water supply systems without heater input limitation; (2) Valves having only pressure relief features for use on storage tanks of hot water supply systems with inputs up to and including 200,000 Btu per hour; (3) Automatic gas shutoff valves and devices; and (4) Vacuum relief valves.
CONTENT PROVIDER
CSA America, Inc. [csa]
CSA America, Inc. [csa]