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CSA ANSI C22.2 NO. 340:23...
AWWA M14 M14: Recommended Practice for Backflow Prevention and Cross-Connection Control Handbook / Manual / Guide by American Water Works Association, 2015
AWWA M14 M14: Recommended Practice for Backflow Prevention and Cross-Connection Control Handbook / Manual / Guide by American Water Works Association, 03/01/2004
AWWA M14 [ Withdrawn ] Recommended Practice for Backflow Prevention and Cross-Connection Control Handbook / Manual / Guide by American Water Works Association, 01/01/1990