B-1.1, r. 3 - Safety Code

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7. Any connection to a water supply system shall be protected from contamination hazards in accordance with standards CSA-B64.10-01 “Manual for the Selection and Installation of Backflow Prevention Devices” and CSA-B64.10.1-01 “Manual for the Maintenance and Field Testing of Backflow Prevention Devices” published by the Canadian Standards Association, as well as any amendment and future editions that may be published by that agency.
O.C. 964-2002, s. 7.