State, Provincial, and Regional Backflow Prevention Education and Training 

CROSS-CONNECTION RULES MANUAL, 2nd Ed.11/93 (with 11/95 update) Michigan Dept. of Environmental Quality, (formerly Public Health)

An Explanation of the Michigan Part 7 Plumbing Code Amendments related to backflow

Michigan Part 7 Plumbing Code Amendments related to backflow

Praire Water News -- Protection of Rural Drinking Water Pipelines..Saskatchewan Water

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MIDWEST BACKFLOW PREVENTION